Index. 



Davis, B. ^r., 187. 

 Deep-sea genera, 22. 



Deep water, collections from, 363. 



Delia Valle, A., cited, 228, 242. 



Development, direct, of Entero- 

 pneiista, 188; of Tornaria, 

 190; larval period of, 190. 



Biazeuzia hyalina, 289. 

 reticulans, 289. 



Didemnidae, 2. 



Didemnum cerenm, 44. 

 opacum, n. sp., 2, 42. 

 sargassicola, 44. 



Dinoflagellata, ecdysis in, 347. 



Diplopsalis lenticula, 348, tig. 3. 



Biscopora, 275, 307. 



Discopora coriacea, 275. 

 pavonclla, 308. 



Distomidae, 2. 



Distribution, bathymetrie, of ascid- 

 ians, 2 ; of Dolichoglossus pu- 

 sillus, 195-6-7. 



Dolichoglossus kowalevskii, meso- 

 blast of, 210. 



Dolichoglossus pusillus, blastopore 

 of, 206; burrow of, 189, 195, 

 198 ; compared with aniphy- 

 oxus, 213; distribution of, 

 195; early growth, stages of, 

 200; eggs of, 189; egg cleav- 

 age of, 201-5; embryos, half 

 and double, 213 ; gastrula of, 

 204 ; gill openings of, 205-6 ; 

 habits and activities of, 192 ; 

 homology of, 215; larval life 

 of, 190; material and methods 

 of study, 188 ; mesoderm and 

 body cavities of, 207-9; spe- 

 cific gravity of, 198. 



Donati, V., cite'fl, 317. 



Drasche, 40. 



Driesch, H., cited. 58. 122. 153; 

 doctrine of entelecliy, 17-1. 



Early Life-History, the, of Do- 

 lichoglossus pusillus Ritter, 

 187. 



Ecdysis, occurrence in dinoflagel- 

 lata, 347 ; relation to schizo- 

 gony, 348. 



Ectoprocta. 255. 



Eggs of Dolichoglossus jnisillus, 

 189. 



Embryos, double and half, of Doli- 

 choglossus ])usillus, 213. 



Ehrenberg, C. G.. cited, 317, 388. 



Ellis. J., cited. 317. 



Endostyle, of Benthaseiilia, 28. 



Entelechy, Driesch 's doctrine of, 

 122, 174. 



Enteropneusta, development of, 

 188; gland cells of, 212; larva 

 of, 190. 

 Escham, 257, 281. 

 Eschara hiaperta, 287. 



cribraria, 308. 



landshorovii, 305. 



pavonella, 308. 

 Escharella, 301. 

 Eschar ella jacotini, 302. 



landsborovii, 305. 



linearis, forma biaperta, 287. 

 Escharidae, 256, 297 ; key to gen- 

 era of, 297. 

 Escharina personata, 289. 

 Escharipora, 279. 

 Escharoides, 298, 301. 

 Eschar oides sarsii, 301. 

 Escharopsis lobata, 301. 

 Eugyra molguloides, 7, 8. 

 Eupera, 29, 30. 



Exuviation, Autotomy and Regen- 

 eration in Ceratium, 345. 

 Exuviation, 349. 

 Fabricius, 0., cited, 317. 

 Fleming, J., cited, 317. 

 Flotation, 81, 376. 

 Flustra, 275. 

 Flustra cecilii, 288. 



coriacae, 275. 



distans, 261. 



isabelliana, 269. 



lacroixii, 261. 



lineata, 265. 



rozierii, 277. 



spinifera, 265. 



tehnelcha, 265. 

 Gastrula, of Dolichoglossus pusil- 

 lus, 204, 206. 

 Genera, deep-sea, 22 ; of escharidae, 



297. 

 Gill openings of Dolichoglossus pu- 

 sillus, 205. 

 Gland cells of enteropneusta, 212. 

 Glaser, O. C, cited, 153. 

 Gonyaulax polyhedra, 347. 

 Gourret, P., cited, 388-9. 

 Growth, stages of, of Dolichoglos- 

 sus pusillus, 200. 

 Gynmolaemata, 255. 

 Habits and activities of Dolicho- 

 glossus pusillus, 192. 

 Habits in the starfish, 148. 

 Halocynthia, 15. 

 Halocynthia arctica, 13. 



castaneiformis, 13. 



echinata, 12. 



hilgendorfi, 12, 13. 



[.397] 



