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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