382 



INDEX. 



Census of Desmids of a Tri- 

 assic district. G. T. 

 Harris . . .150 



Centrifuge (The) in collecting 191 

 Chaoborus crystallinus. The 



larva of . . .264 



Charophyta, On the. G. R. 



Bullock- Webster . . 256 



Chirodiscoides caviae . .230 



Chlorella, Species of (goni- 



dium) . . .167 



Chlorophyll and its preserva- 

 tion . . . .225 

 Cladonia digitata . .164 

 Closteria pools . . .146 

 Closterium Malinverianum . 147 



— praelongum . . .147 

 Closterium, The genus. J. 



Vfilson . . .360 



Coal measures, Floral and 



faunal remains of. G. 



H. Rodman . .187 



Collomia coccinea, Seeds of . 96 

 Comatricha nigra . . 133 



Conochilus volvox . .202 



Continuity, Remarks on. N. 



Yermoloff ... 46 

 Conversion of English and 



metrical measures, Table 



for . . 62, 106, 209 



Cornuvia Serpula . . 9 



Cosmarium Corbula . ,148 



— oblongum . . .148 

 Cotyledons, The f miction 



of . . . .198 



Cover-glass cleaner . . 249 



Cristatella mucedo . . 355 



Critical illumination. The 



position of . . 76, 97 



Curwen, B. S. Notes on a few 



days' shore collecting . 253 



— Momiting in glycerin 



with wax seals . . 355 

 — with balsam as a sealing 



agent . . . 358 



Cuzner, E. Some studies 



in marine zoology . 364 



Cylindrocystis Brebissonii . 147 



D 



Dark- ground illumination . 363 

 Dark-ground stop for pond- 

 life . . . .359 

 Davidson, F. The "micro- 

 telescope " and " super- 

 microscope" . . 369 



PAGE 



Deep-sea deposits. A. Ear- 

 land . . .336 

 Desmid floras. Table of . 140 

 Desmidium cylindricum . 148 



— Swartzii . . .148 

 Desmids of a Triassic district. 



Census of . . ,150 



Diatom variation . , 193 



Diatoms, Systematics of . 194 



— Structure and growth of. 



N. E. Brown . .265 



" Diffractions-Platte " ex- 

 periments . . .73 

 " D.I.P," cement . . 222 

 Docidium baculum . ,147 

 Drosera, The genus . . 24 

 Duncan, F. M. Studies in 



marine zoology . . 100 



— Some raethods of prepar- 



ing marine specimens . 215 



E 



Earland, A. Deep-sea De- 

 posits . . .336 



Encentrum Murrayi, sp. no v. 318 



Endoparasite in M. rus- 



seola .... 327 



Evens, E.D. Fluidmounting 221 



— Mounting fresh - water 



algae, mosses, etc. . 225 



— Note on glycerin as a 



mounting medium . 359 



Excursions, 1918 . . 67 



— 1919 . . . .178 



— 1920 . . . .244 



— 1921 . . . .374 

 Eyepieces, capped. E. M. 



Nelson . . .190 



— new powers of . . 298 

 Eylais, The genus (Hydracar- 



ina). C. D. Soar and 



W. Wilhamson . . 107 



Eylais bicornuta . . 116 



— bisinuosa , . .129 



— celtica . . .117 



— discreta . . .117 

 V. stagnalis . . 118 



— extendens . . .108 



— georgei . . .111 



— gigas .... 125 



— hamata . . ,110 



— infundibulifera . . 126 



— koenikei . . .121 



— meridionalis . , ,127 



— iniilleri. . , ,111 



— neglecta . . . 123 



