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58 ZYGNEMATACEAE 23. Zygnemopsis pectinata (Fritsch) Transeau 1934. Trans. Amer. Micros. Soc. 53, p. 216. Ohio Jour. Sci. 25, p. 198, Figs. 38-44. 1925. Vegetative cells 36-42 ^ x 83-200 ju-; chromatophores 2, stellate or elongated stellate, each with a pyrenoid or rarely 2 or 3 pyrenoids; zygospores unknown; akinetes swollen toward the middle to 80 m, with walls 6-8 /i thick, sometimes obliquely ventricose, alternating in succes- sive cells; aplanospores ellipsoid, or with polar thickenings, 70-94 ^ x ioo-i28iit; outer spore wall 4-8^1 thick, smooth; median spore wall irregularly granulose. (PI. IX, Figs. 18-21.) South Africa, Kentani District. The specimens upon which this description is based have an amazing variety of chromatophores only illustrated in part in the publication of 1925. None of the spores examined is believed to be fully mature. 24. Zygnemopsis hodgettsii Transeau 1934. Trans. Amer. Micros. Soc. 53, p. 216. Hodgetts. Trans. Roy. Soc. S. Africa. 13, p. 67. 1925. Vegetative cells ju- 35-50 x yu, 20-75 ^^ diameter, with 2 stellate chromatophores; zygospores unknown; aplanospores ovoid, 40-55^ x 65-8ojLi, immature. (PI. IX, Fig. 22.) South Africa, Stellenbosch. This and the 2 preceding species are obviously imperfectly described species, but have characteristics that clearly place them in this genus, and not in the genus Zygnema. List of the Species of ZYGNEMOPSIS with Number americana Transeau 1934 cokimbiana Transeau 1934 7 decussata Transeau 1934 20 desmidioides (W. & G. S. West) Transeau 1934 6 jertilis (Fritsch & Rich) Transeau 1934 22 floridanu Transeau 1934 4 gracilis Randhawa 1938 3 hodgettsii Transeau 1934 indica Randhawa 1937 11 iyengarii Randhawa 1937 lamellata Randhawa 1937 18 7ninuta Randhawa 1937 5 orientalis (Carter) Transeau 1944 2 pectinata (Fritsch) Transeau 1934 ^3 8 24 15
quadrata Jao 1935 ZYGNEMOPSIS 59 sikangensis Li 1939 i sinensis Transeau 1934 10 sphaerospora Randhawa 1938 17 spiralis (Fritsch) Transeau 1934 21 splendens Randhawa 1937 12 stephensiae Transeau 1934 14 tiffaniana Transeau 1944 9 transeauiana Randhawa 1938 19 wuc/iangensis Li 1937 13 16
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10 ib
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THE ZYGNEMATACEAE
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GRADUATE SCHOOL MONOGRAPHS Contribu
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INTRODUCTION The absence of a moder
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INTRODUCTION ix Illinois State Teac
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Plat€ ILLUSTRATIONS Plates Page I
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THE ZYGNEMATACEAE
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4 ZYGNEMATACEAE gametes is by means
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6 ZYGNEMATACEAE are common but are
Page 28 and 29: 8 ZYGNEMATACEAE between cells, the
Page 30 and 31: 10 ZYGNEMATACEAE sporiferous cells
Page 32 and 33: 12 ZYGNEMATACEAE TABLE I Summary of
Page 34 and 35: 14 ZYGNEMATACEAE In higher latitude
Page 36 and 37: i6 ZYGNEMATACEAE specimens with mat
Page 38 and 39: 1 ZYGNEMATACEAE II. Spores usually
Page 40 and 41: 20 ZYGNEMATACEAE 32. Diameter veget
Page 42 and 43: 22 ZYGNEMATACEAE REPRODUCTION BY AP
Page 44 and 45: 24 ZYGNEMATACEAE spores formed in t
Page 46 and 47: 26 ZYGNEMATACEAE pitted; pits 5-6 /
Page 48 and 49: 28 ZYGNEMATACEAE spores are formed
Page 50 and 51: 30 ZYGNEMATACEAE spores formed in t
Page 52 and 53: 32 ZYGNEMATACEAE biculate; pits 4.5
Page 54 and 55: 34 ZYGNEMATACEAE United States: Ill
Page 56 and 57: 36 ZYGNEMATACEAE zygospores globose
Page 58 and 59: 38 ZYGNEMATACEAE spores formed in o
Page 60 and 61: 40 ZYGNEMATACEAE spores in one of t
Page 62 and 63: 42 ZYGNEMATACEAE an outer pectic la
Page 64 and 65: 44 ZYGNEMATACEAE irregular in form
Page 66 and 67: 46 ZYGNEMATACEAE cylindncum Transea
Page 69 and 70: CHAPTER THREE THE GENUS ZYGNEMOPSIS
Page 71 and 72: ZYGNEMOPSIS 51 6. Median spore wall
Page 73 and 74: ZYGNEMOPSIS 53 22-25 jLi X 25-30 /"
Page 75 and 76: ZYGNEMOPSIS 55 12. Zygnemopsis sple
Page 77: ZYGNEMOPSIS 57 23-50 Ai, with a mor
Page 83 and 84: CHAPTER FIVE THE GENUS ZYGOGONIUM K
Page 85 and 86: ZYGOGONIUM 65 3. Zygospores 15-26/U
Page 87 and 88: ZYGOGONIUM 67 ospores ellipsoid to
Page 89: ZYGOGONIUM 69 14. Zygogonium stephe
Page 93 and 94: CHAPTER SEVEN THE GENUS MOUGEOTIOPS
Page 95 and 96: CHAPTER RIGHT THE GENUS DEBARYA WIT
Page 97 and 98: DEBARYA 77 3. Debarya ackleyana Tra
Page 99 and 100: CHAPTER NINE THE GENUS MOUGEOTIA C.
Page 101 and 102: MOUGEOTIA 8i not be cited as proof
Page 103 and 104: 7. Spores globose to ovoid, variabl
Page 105 and 106: MOUGEOTIA 85 30. Spores ovoid 40-54
Page 107 and 108: MOUGEOTIA 87 52. Zygosporangia regu
Page 109 and 110: MOUGEOTIA 89 74. Spore wall smooth
Page 111 and 112: MOUGEOTIA 91 6. MouGEOTiA ELLiPsoiD
Page 113 and 114: MOUGEOTIA 93 tending somewhat into
Page 115 and 116: MOUGEOTIA 95 conjugation scalarifor
Page 117 and 118: MOUGEOTIA 97 pyrenoids; gametangia
Page 119 and 120: MOUGEOTIA 99 ous scattered pyrenoid
Page 121 and 122: MOUGEOTIA loi cylindric, with conca
Page 123 and 124: MOUGEOTIA 103 56. MouGEOTiA ATUBULO
Page 125 and 126: MOUGEOTIA 105 aplanospores occupyin
Page 127 and 128: MOUGEOTIA 107 with hornlike process
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MOUGEOTIA 109 77. MouGEOTiA viRiDis
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MOUGEOTIA III 85. MouGEOTiA QUADRAN
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MOUGEOTIA 113 94. MouGEOTiA MAYORi
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MOUGEOTIA 115 craterophora Bohlin 1
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CHAPTER TEN THE GENUS TEMNOGAMETUM
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CHAPTER ELEVEN THE GENUS SIROCLADIU
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CHAPTER THIRTEEN THE GENUS SPIROGYR
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SPIROGYRA 125 in thickness, and eac
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SPIROGYRA 127 may be widened and ne
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SPIROGYRA 129 Of the 2 species with
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SPIROGYRA 131 II. Most of the spore
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31. Diameter vegetative cells more
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SPIROGYRA 135 END WALLS PLANE (one-
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66. Spores 34-48 i". x 48-54^1 93-
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82. Median spore wall double, outer
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loi. Fertile cells cylindric, chrom
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115. Diameter vegetative cells 130-
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SPIROGYRA 145 133. Reproducing by a
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SPIROGYRA 147 157. Median spore wal
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SPIROGYRA 149 178. Chromatophores i
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SPIROGYRA 151 3. Spirogyra juercens
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SPIROGYRA 153 China, Szechwan. The
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SPIROGYRA 155 matophore; conjugatio
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SPIROGYRA 157 23. Spirogyra affinis
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SPIROGYRA 159 cells to globose, 28-
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SPIROGYRA i6i qucntly misapplied th
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SPIROGYRA 163 scalariform; tubes fo
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SPIROGYRA 165 ellipsoid, ^P-^^i^ x
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Germany; Latvia; Yugoslavia; Finlan
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Coll.). SPIROGYRA 169 Dutch New Gui
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SPIROGYRA 171 formed by both gameta
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SPIROGYRA 173 This imperfectly desc
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SPIROGYRA 175 Vegetative cells 35-4
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SPIROGYRA 177 loi. Spirogyra polyta
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SPIROGYRA 179 formed by both gameta
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SPIROGYRA i8i is thin, brownish and
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SPIROGYRA 183 PI. 8, Figs. 87-88. A
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SPIROGYRA 185 United States: Widely
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SPIROGYRA 187 65-83 /x X 75-1 00 /x
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SPIROGYRA 189 150. Spirogyra reinha
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SPIROGYRA 191 cylindric or slightly
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SPIROGYRA 193 by both gametangia; f
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SPIROGYRA 195 although the tubes be
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wall. United States: Texas, Karnac,
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SPIROGYRA 199 found the earlier sta
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SPIROGYRA 201 matophore, making 3 t
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SPIROGYRA 203 199. Spirogyra unduli
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SPIROGYRA 205 United States: Iowa;
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SPIROGYRA 207 spores ellipsoid, 20-
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SPIROGYRA 209 iform; tubes formed b
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SPIROGYRA 211 tubes formed by both
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SPIROGYRA 213 forma gracilior). Czu
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SPIROGYRA 215 244. Spirogyra gratia
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SPIROGYRA 217 252. Spirogyra incons
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SPIROGYRA 219 iform; tubes formed b
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SPIROGYRA 221 zygospores ellipsoid
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SPIROGYRA 223 274. Spirogyra verruc
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SPIROGYRA 225 elliptica Jao 1935 83
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SPIROGYRA 227 mirabilis (Hassall) K
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SPIROGYRA 229 siibsalina Cedercreut
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232 ZYGNEMATACEAE Usually the matur
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234 ZYGNEMATACEAE cncd and rcilexcd
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236 ZYGNEMATACEAE Figs. H to K. Sir
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INDEX Roman numerals refer to plate
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grossii (Spirogyra), XXX, 6; 185 Ha
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punctiformis (Spirogyra), XXXIV, 5-
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PLATES
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PLATE 1 247.
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PLATE ir 249
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PLATE III 251
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PLATE IV 253
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PLATE V 255
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PLATE VI 257
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PLATE VII 259
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PLATE VIII 261
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PLATE IX 263
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PLATE X 265 '^=S
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PLATE XI 267
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PLATE XII 269
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PLATE XIII 271
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PLATE XIV 273
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PLATE XV 275
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PLATE XVI 277
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PLATE XVII 279
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PLATE XVIII 281
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PLATE XIX 283
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PLATE XX 285
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PLATE XXI 287
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PLATE XXII 289
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PLATE XXIII 291
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PLATE XXIV 293
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PLATE XXV 295
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PLATE XXVI 297
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PLATE XXVII 299
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PLATE XXVIII 301
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PLATE XXIX 303
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PLATE XXX 305
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PLATE XXXI 307
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PLATE XXXII 309
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PLATE XXXIII 311
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PLATE XXXIV 313
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PLATE XXXV 315
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PLATE XXXVI 317
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PLATE XXXVII 319
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PLATE XXXVIII 321
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PLATE XXXIX 323
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PLATE XL 325
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PLATE XLI 327
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