358 



Cosmocladium pulchellum Breb., 173 

 (fig. 66 B), 174. 



saxonicum De Bary, 174. 

 Cox, 265. 



Craterospermum Braun, 121. 

 Craticular state (of Diatoms), 270. 

 Crucigenia Morren, 215, 216, 217. 



irregularis Wille, 217. 



quadrata Morren, 216 (fig. 90 D 

 and E). 



rectangularis (Nag.) Gay, 216 (fig. 

 90 A C), 217. 



Tetrapedia (Kirchn.) W. <& G. S. 

 West, 216 (fig. 90 F). 



triangularis Chodat, 216. 

 Crucigenieae, 212, 215217. 

 Crustacea, 7, 145, 219, 270. 

 Cryoplankton, 5. 

 Cryptoglena Ehrenb., 32. 

 CryptomonadinaceEe, 45. 

 Cryptomonas Ehrenb., 45. 

 Cryptonemiaceae, 35, 43. 

 Cthonoblastus Ku'tz. , 332. 

 Cultivation of Algas, 9. 

 CyanophycecB, 3, 306 352. 

 Cyanophycin, 311. 

 Cyanoplast, 308, 309. 

 Cycas, 325. 

 Cyclops, 219. 

 Cyclotella Kiitz., 276. 



comta (Ehrenb.) Kiitz., 276. 



Kutzingiana Chauvin, 276. 



Meneghiniana Kiitz., 276. 



operculata Kiitz., 276, 277 (fig. 127 



B and C). 

 Cylindrocapsa Reinsch, 54, 81, 82. 



conferta West, 82 (fig. 26 E and 

 F), 83. 



geminella Wolle var. minor Hansg., 

 83. 



involuta Reinsch, 82 (fig. 26 A D), 

 83. 



nuda Reinsoh, 83. 

 Cylindrccapsaceae, 30, 66, 81 83. 

 Cylindrocystis Menegh., 143, 144, 148, 

 149, 152, 155, 159. 



Brebissonii Menegh., 155 (fig. 54 

 H and I), 156. 



crassa De Bary, 156. 



diplospora Lund., 142, 155 (fig. 

 54 J), 156. 



diplospora var. major West, 156. 

 Cylindrospermum Kiitz., 325, 326, 329. 



catenatum Ralfs, 329. 



macrospermum Rabenh., 329. 



majus Kiitz., 329. 



stagnale (Kiitz.) Born. t& Flah., 328 



(fig. 150 E G), 329. 

 Cylindrotheca Rabenh., 278. 



gracilis (Breb.) Grun., 279. 



Cystocarp, 16, 35. 

 Cystococcus Nag., 202. 

 Cysts, 14, 102, 111, 121. 



Dactylococcopsis Hansg., 346, 347. 



montana W. & G. S. West, 348 



(fig. 162 A). 



rhaphidioides Hansg., 348. 

 Dactylococcus Nag., 218, 223, 348. 



bicaudatus A. Br., 219 (fig. 91 A), 



223. 



bicaudatus var. subramosus W. & 

 G. S. IFes,219(fig. 91 B and C). 

 Debaryanns Ileinsch, 219. 

 dispar W. <& G. S. West, 219 (fig. 



91 D). 



infusioniim Nag,, 219, 220. 

 Dactylothece Lager li., 30, 33, 246. 



Braunii Lagerh., 206, 246 (fig. 114). 

 Dangeard, 51, 193, 214, 310. 

 Dasyglosa Thwaites, 330, 332. 



amorpha Thwaites, 331 (fig. 151 C), 



332. 



De Bary, 142. 

 DJybarya Wittr., 123, 124, 127. 



calospora (Palla) W. & G. S. West, 



53, 128 (fig. 46 B). 

 Desmidioides W. & G. S. West, 128 



(fig. 46 F I), 129, 143, 144. 

 glyptosperma (De Bary) Wittr., 128 



(fig. 46 A). 

 Iffivis (Kiitz.) W. <& G. S. West, 



128 (fig. 46 C E). 

 Deiniga, 308. 

 Denticula Kiitz., 283, 285. 

 elegans Kiitz., 283. 

 tenuis Kiitz., 283, 284 (fig. 130 



C and D). 



Derbes & Solier, 257. 

 Desmagonium Ehrenb., 288. 

 Desmidiaceffi, 5, 6, 8, 11, 14, 16, 27, 28, 

 30, 33, 50, 5254, 114116, 

 129, 135178, 266, 309. 

 Desmidieffi, 148. 



Desmidium Ag., 143, 144, 151, 177. 

 aptogonum Breb., Ill (fig. 69 D). 

 cylindricum Grev., 140, 143, 177 



(fig. 69 C), 178. 



graciliceps (Nordst.) Lagerh., 178. 

 quadratum Nordst.. 177 (fig. 69 B), 



178. 



Swartzii Ag., Ill (fig. 69 A), 178. 

 Desmonema Berk. & Thwaites, 322, 324. 

 Wrangelii (Ag.) Born. & Flah. , 324. 

 De Toni, 72. 

 Diadesmis Kiitz., 292. 

 Diatoma D. C., 284. 



elongatum Ag., 285 (fig. 131 A D). 

 hiemale (Lyngb.) Heib., 285 (fig. 

 131 E F). 



