Translation 2816

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55 3. Antapical horn points inwards, is relatively short, and occasionally is almost parallel to the apical horn. (Cells are often up to 50.4 in width). ' Brachyceroides type 4. B. Short, wide, tricornute forms, over 45)q in width and 115-170/q in length. The two posterior horns divaricate slightly. Carinthiacum type 5. C. Short or long forms, over 45 ,4 in width; tetracerous under__ conditions of optimal development; the left postequatorial horn may be either short andtruncated or developed as a distinct horn. Apical portion is conical, but less tall (than in A), and usually much flatter, often even capshaped. 1. Postequatorial horns do not divaricate, or divaricate only slightly. In general, forms are still somewhat thin. (a)Antapical horn is directed in the sanie direction as the apical horn, and right postequatorial horn is parallel to the antapical horn, occasionally slightly divaricating. Cell body usually is without dorsal convexity (along the longitudinal axis). Ridges produced by thickening in the cell membrane are fragile and reticular. Gracile type 6. (263) (b) Antapical horn and postequatorial horn point more outwards. Entire cell bodyis dorsally convex (along the longitudinal axis). Ridges produced by thickening in the cell membrane are solid and usually irregular. 2obustum type 7.
56 2. Divarication of postequatorial horns is. medium. Somewhat smaller, w:ider, more bulky forms. Antapical horn points outerards . . . . . . . . . . . . . . . . Austriacum type 8. 3. Postequatorial horns divaricate strongly. (a) Antapical horn is short, directed'in the same direction as the apical horn. The hypovalve is nôticeab7.y short. Scotticum t•,rEe IF. (b) Antapical horn is longer, and pointing outwards. The hypovalve is somewhat longer. ... Piburgense t,ype 10. Synopsis of families and Z^jnera. (287) i_ ^ , +..ai ar e > > • ^^ ,^ i.,,,,+, ^@11^ \JTl ^:yStlî! ïotill) 1C.fGn^âucuiy e1lliJUl.lGl, ^uia ^c., `Jr fusiforLl, more or less cuspidate on both ends and often with corneous extensions (acicular cysts), or flatly polygonal or tetrahedral, with spines on the corners. Usually free-living (only the genus Stylodinium, which is not to be treated here, and two species of Cystodini um are attached). Reproduction is zoosporous or autosporous. Family: Cystodiniaceae nom. nov. With 4 genera: (a) Acicular cysts or elongated., non-cuspidate cysts. Genus: Cystodinium (b) Flat polygonal cysts with spines on the corners. Genus: Dinastridium. (c) Tetrahedral- cysts with spines on the corners: Genus: Tetradinium
Page 1 and 2:
w Es FISHERIES RESEARCH BOARD OF CA
Page 3 and 4:
s C+'EPARTMEKT 0^•=i (1E:SEGRE-TA
Page 5 and 6: 1 IL * 3 Family IV. Katablepharidac
Page 7 and 8: 5% 5. Cells are cylindrical to cyli
Page 9 and 10: 7 (Possiblyalso the forms under B,
Page 11 and 12: 1 ,` • •• a.- 9 are usually o
Page 13 and 14: 11 rounded, or it may be rounded an
Page 15 and 16: 13 nose-like nrotrusion. Cells are
Page 17 and 18: 2. Posterior end truncated, usualIy
Page 19 and 20: 17 • structure. There are one.or
Page 21 and 22: 19 A. Cells laterally compressed v
Page 23 and 24: 21 2b. Cells obovoid to pyriform, b
Page 25 and 26: 24 consists of dissimilar polygonal
Page 27 and 28: 26 B. Cells are larger: length, 18-
Page 29 and 30: 28 larger than the hypovalve. Stigm
Page 31 and 32: 30 The epivalve and the hypovalve a
Page 33 and 34: 32 flattened dorsiventrally. Nieasu
Page 35 and 36: 34. 1"Longitudina1 groove carinate.
Page 37 and 38: 36 broadly oval with slight indenta
Page 39 and 40: 38 2. Cells have the shape of a tru
Page 41 and 42: B. Posterior end not rounded (or ro
Page 43 and 44: 42 B. Coverings (shells) represent
Page 45 and 46: 44 I. Epivalve with 16 plates (8 pr
Page 47 and 48: 46 2. Valves not both the same size
Page 49 and 50: ,a • 48' 2. Cells are oval to sph
Page 51 and 52: 50 1. Cells are ovoid to almost sph
Page 53 and 54: 52 1. Cell outline is pentangular,
Page 55: 54 Key to the identification of the
Page 59 and 60: 58 1. Terminal spines are relativel
Page 61: 60 (b) Cysts are ellipsoidal. Autos
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Translation 2816

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