470 



SUBJECTS INDEX 



Ephyropsidte, 119, 123. 



Epiactis, 100. 



Epibolic gastrula, see Gastrula, 



epibolic. 

 Epibulia, 68, 71. 

 Epitokal forms of Nereidse, 303. 

 Errautia, segmeutal appendages of, 



279. 

 Ersffise, 71. 

 Esperia, 24, 27. 

 Eucbaiis, 145, 151, 153. 

 Eudendrium, 42. 

 Eudoxia, 70-72. 

 Euleiheria, 154, 

 Eunice, 2*32. 



Eupomatus, 263, 267, 289, 295. 

 Eurampba, 15 L. 

 Eurjlepta, 161. 

 Euiyleptidae, 160. 

 Euspongia, 23. 

 Eutima, 74. 

 Exogone, 262, 280. 



Fertilization, 2. 

 Flabellum, 100, 102. 

 Frustulatiou, 49. 

 Fuugia, 100. 

 Fungiacese, 101. 

 Fuugidffi 102. 



Galaxea, 101. 

 Galeolaria, 71. 

 Gasterostomum, 184. 

 Gasterotrocbse, 271, 277. 

 Gastrea, 5. 

 Gastroblasta, 49. 



Eaffaeli, 49. 



timida, 49. 

 Gastrodes, 58. 

 Gastrula, 4. 



circumcrescence, see Gastrula, 

 epibolic. 



embolic, 6. 



epibolic, 7. 



invagination, see Gastrula, 

 embolic. 

 Gemmulffi, 13, 34, 35. 

 Gephyrea, 365. 

 Germinative vesicle, 3. 

 GeryonidaB, 53. 

 Gnathobdellidse, 325. 

 Gonactinia, 95, 100. 

 Gonad, 2. 

 Gordiidfe, 244. 

 Gordius aquations, 244. 



relationsbips 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. 

 HeterocyemidBS, 214. 

 Heterodera, 241. 

 Heterogeny, 2. 

 Hexacorallia, 93. 

 HexactinellidiB, 32. 

 Hexactiuiffi, 91. 

 Hexarthra, 260. 

 Hippodius, 59. 

 Hirudinea, 318. 



relationships 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. 



mesencbyma 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. 

 lufusorigen embryos of Dicye- 



midaj, 213. 

 Ingression, multipolar, 9. 



polar, 6. 

 Intoshia gigas, 206. 



Linei, 206. 

 Isodyctia, 24. 



Kopfkeim (Hirudinea), 329. 



Laceration, reproduction by, 101. 

 Lampetia, 144, 151. 

 Lanice, 295. 

 Leptomedusse, 48. 



i 



