SUBJECTS INDEX 



471 



Leucandra, 20. 

 Leucochloridium, 185, 187. 

 Leucosolenia, 33. 

 Lilyopsis, 71. 

 Lineus lacteus, 217. 



obscurus (Figs. 105-107), 224-5. 

 Liriope, 56. 

 Lizzia, 49. 

 Lobatffi, 151, 152. 

 Loimia, 295. 

 Lopadorhyncbus, 288, 292-294, 



300. 

 Lophocalyx, 34. 

 Lucernaridse, 102. 

 Lumbricidffi, 231, 300. 

 Lumbriconereis, 275. 

 Lumbriculus, 301. 

 Lumbricus, 281, 283, 284, 291, 293, 



294, 297, 300. 



Macrostomum, 173, 176. 

 Madreporaria, 98. 

 Magelona, 278. 

 Malacobdella, 228. 

 Malacodermata, 100. 

 Mauicina, 89, 95. 

 Meandrina, 102. 

 Medusoid theory, 72. 

 Medusom, 65. 

 Megascolex, 291. 

 Melithsea, 83. 



Meridional cleavage furrows, 3. 

 Mermis, 240. 

 MermitliidEe, 239. 

 Meroblastic eggs, 7. 

 Mertensise, 151. 

 Mesenchyma, 11. 

 Mesentery, 11. 

 Mesoderm, 5, 10. 



somatic, 11. 



splanchnic, 11. 

 Mesodermic bands, 10. 

 MesoglcEa, 79. 

 Mesotrochae 271, 272, 274. 

 Mesozoa, 215. 

 Metagenesis, 2. 



Metastomial discB (Pilidium), 221. 

 Metazoa, 1. 



Microcotyle (Fig. 93), 188. 

 Microcyema, 214. 

 Microhydra, 49. 

 Millepora, 53. 

 Mitrana, 275, 276, 316. 

 Mitrocoma, 43. 

 Mnemiopsis, 151. 

 Monactinellidse, 32. 

 Monaulese, 94. 



Monophyes, 72. 

 Monophyidse 72. 

 Monopora, 217, 228, 229. 

 Monostomum, 190. 



flavum, 187. 



foliaceum, 200. 



mutabile, 187. 

 Monotidae, 177. 

 Monotrochse, 271, 275. 

 Monoxenia, 77. 

 Muggisea, 72. 



Miiller's larva, 165, 167, 168. 

 Multipolar ingression, see Ingres- 



sion, multipolar. 

 Myzostoma cirriferum, 315. 



complemeotal males of, 318. 



glabrum, 315. 



Naididae, non-sexual reproduction 



of, 302. 

 Narcomedusse, 53, 57. 

 Nausithoe, 113, 119. 

 Nemathelminthes, 234. 

 Nematoda, 234. 



relationships of, 246. 

 Nematogen embryos of Dicyemidse, 



210. 

 Nemertini, 217. 



relationships of, 230. 

 Nephelis, 318, 325, 328. 

 Nereidae, atokal forms of, 303. 



epitokal forms of, 303. 



non -sexual reproduction of, 

 303. 

 Nereis, 3, 263, 279, 286. 

 Nerine, 278. 

 Neuronephroblast (Hirudinea), 



320. 

 Neuropore of Balanoglossus, 338. 

 Non-sexual reproduction, 12. 

 Nototrochae, 271, 277. 



Obelia, 48. 



Oceania, 49, 113. 



Oculinacea, 101. 



Ocyrrhoe, 151. 



Oligochaeta, 281. 



Oligocladus, 167. 



Olynthus, 19. 



Ophiactis, reproduction by division 



in, 465. 

 Ophioglypha, mesenchyma of, 400. 

 Ophiopholis, mesenchyma of, 403. 

 Ophiotrix, enterohydrocoele of, 413. 

 OiDhiuroidea, 422, 437. 

 mesenchyma of, 400. 



