470 



SUBJECTS INDEX 



Ephyropsidee, 119, 123. 



Epiactis, 100. 



Epibolic gastrula, see Gastrula, 



epibolic. 

 Epibulia, (58, 71. 

 Epitokal forms of Nereidse, 303. 

 Errantia, segmeutal appendages of, 



279. 

 Ersffite, 71. 

 Esperia, 21, 27. 

 Euchaiis, 145, 151, 153. 

 Eudendrium, 42. 

 Eudoxia, 70-72. 

 Euletheria, 154. 

 Eunice, 2<52. 



Eupomatus, 263, 267, 289, 295. 

 Eurampba, 151. 

 Eurylepta, 161. 

 Euryleptidse, 1(50. 

 Euspongia, 23. 

 Eutima, 74. 

 Exogone, 262, 280. 



Fertilization, 2. 

 Flabellum, 100, 102. 

 Frustulation, 49. 

 Fuugia, 100. 

 Fungiacese, 101. 

 Fuugidse, 102. 



Galaxea, 101. 

 Galeolaria, 71. 

 Gasterostomum, 184. 

 Gasterotrochee, 271, 277. 

 Gastrea, 5. 

 Gastroblasta, 49. 



Kaffaeli, 49. 



timida, 49. 

 Gastrodes, 58. 

 Gastrula, 4. 



circumcrescence, see Gastrula, 

 epibolic. 



embolic, 6. 



epibolic, 7. 



invagination, see Gastrula, 

 embolic. 

 Gemmulse, 13, 34, 35. 

 Gephyrea, 365. 

 Germinative vesicle, 3. 

 Geryonidoe, 53. 

 Gnatbobdellidffi, 325. 

 Gonactinia, 95, 100. 

 Gonad, 2. 

 Gordiida), 244. 

 Gordius aquaticus, 244. 



relationships of, 246. 



Villoti, 244. 



Grubea, 262, 280. 

 Gyrodactylus, 188, 189. 



Halcampa, 94. 

 Halecium, 51. 

 Halisarca, 20, 25, 28. 

 Halistemma, 60-62. 



pictum, 62 



rubrum, 62. 

 Herpetolitha, 101. 

 Heterakis, 239. 

 Heteraxonia, 10. 

 Heterocyemidffi, 214. 

 Heterodera, 241. 

 Heterogeny, 2. 

 Hexacorallia, 93. 

 Hexactinellidffi, 32. 

 Hexactiuise, 91. 

 Hexarthra, 260. 

 Hippodius, 59. 

 Hirudinea, 318. 



relationshii^s of, 336. 

 Hirudo, 318, 328. 

 Holoblastic eggs, 7. 

 Holothuria, 393. 



mesencbymaof, 397, 404, 456. 



vasoperitoneal vesicle of, 410. 

 Holothurioidea, 392, 417, 426. 



cleavage in, 392. 



mesenchyma of, 400. 

 Hybocodon, 64, 72. 

 Hydra, 39, 42. 47,51, 52. 



Koeselii, 52. 



Tremblyi, 52. 

 Hydracorallia, 53. 

 Hydractinia, 47. 

 Hydroid medusa, 39, 40, 126. 



polyp, 43, 50. 



theory, 39. 

 Hydroidea, 39. 

 Hydrozoa, 39. 



Ichthyocrinoidea, 444. 

 Infusorigen embryos of Dicye- 



midse, 213. 

 Ingression, multipolar, 9. 



polar, 6. 

 Intosbia gigas, 206. 



Linei, 206. 

 Isodyctia, 24. 



Kopfkeim (Hirudinea), 329. 



Laceration, reproduction by, 101. 

 Lampetia, 144, 151. 

 Lanice, 295. 

 Leptomedusae, 48. 



