INDEX. 



389 



Ossicle, pyloric, 192. 



Otocyst of Hydro Medusa, ">">. 



Ovariolc, 263. 



Ovary of Crab, 194, 204 ; of Cyclops, 

 229; of Earthworm, 152; of Ano- 

 donta ; of Grasshopper, 263 ; of Leech, 

 166 ; of Sea Urchin ; of Squid, 348, 

 353 ; of Starfish, 68. 



Ovarian eggs, 312; plates, 85. 



Oviduct of Crab, 204; of Grasshopper, 

 263; of Earthworm, 152 ; of Cyclops, 

 226, 228; of Leech, 166; of Squid, 

 353. 



Ovipositor of Grasshopper, 251, 256. 



Ovisac, 226. 



Oyster development, xxviii. 



Pallial line, 272. 



Palpiger, 245. 



Paramcecium, ii. ; anus of, 11 ; cilia of, 

 8; contractile vesicle of, 11; cuticle 

 of, 9; digestive organs, 10; ectosarc, 

 9; endoplast, 12 ; endosarc, 9; food 

 vacuole, 11; oesophagus, 10; peri- 

 stome, 10; sarcode, 9; vestibule, 10. 



Parieto-splanchnic ganglia, 288. 



Patagium, 250. 



Pearly layer, 273. 



Pedal ganglia of Anodonta, 246. 



Pedicellarias 58, 73, 84. 



Pen of Squid, 335, 363, 368. 



Penis of Leech, 166. 



Pereiopod, 175, 176, 188, 214, 217, 218. 



Pericardium of Anodonta, 274, 281, 293 ; 

 of Crab, 192; of Squid, 343. 



Pericardium of Starfish, 71. 



Peri-ha-rnal vessels of Starlish, 71, 72, 

 77. 



Periproct of Sea Urchin, 85. 



Perisarc, 32. 



IVri^oina, 57. 



Peristomc of Crab, 179; of Paramce- 

 cium, 10 ; of Vorticella, 14 ; of Sea 

 Urchin, 84; of Starfish, 63, 68. 



Perivisoeral Fluid, 143. 



Pharynx of Earthworm, 143, 158; of 

 Leech, 163, 16 1. 



Pleopod of Crab, 171; of Lobster, 187. 



Pleura of Crab, 173; of Lobster, 187. 



Pluteus of Sea Urchin, 110. 



Podical plate, 253. 



Polar globule, 319. 



Polian vesicle, 69. 



Postscutellum, 247. 



Prescutum, 247. 



Principal axis of egg, 103. 



Prismatic layer, 273. 



Proboscis, 160. 



Pronotum, 246. 



Propodite, 176. 



Prostate gland, 350, 352. 



Prosternum, 247. 



Prothorax, 246. 



Proventriculus, 261. 



Protopoclite, 172, 175. 



Pscudopodia, 4. 



Pulvillus, 242. 



Pupil of Squid, 358. 



Pyloric coeca of Crab, 201 ; pouch of 

 ( 'rah, 200 ; sac of Starfish, 64. 



Racemose vesicle, 70. 



llacliis, 57. 



Radial water tube, 58, 69, 78, 91,96, 98. 



Radula of Sea Urchin, 96 ; of Squid, 

 357. 



Receptaculum scminis, 151. 



Rectum of Anodonta, 274, 284, 286 ; of 

 Crab Zoea, '209 ; of Grasshopper, 262 ; 

 of Squid, 338, 346, 371. 



Regeneration of lost parts, 36. 



Renal organ of Anodonta, 281, 282; 

 of Lamellibranch embryo, 329; of 

 Squid, 340, 341. 



Reproductive calycle, 49; organs of 

 Anodonta, 284, 296; of Crab, 204, 

 205 ; of Cyclops, 228. 230 ; of Earth- 

 worm, 149; of Grasshopper, 259, 

 263; of Hydro Medusa, 42; of 

 Leech, 161, 162, 166; of Sea Urchin, 

 91 ; of Squid, 349, 352 ; of Starfish, 

 68. 



Respiratory organs of Crab, 195. 



Respiratory tree, 65. 



Keying Mau-o of egg, 104, 321. 



Retina of Squid, 359. 



