INDEX. 



389 



Ossicle, pyloric, 192. 



Otocyst of Hydro Medusa, 55. 



Ovariole, 263. 



0\ arj- of Crab, 194, 204 ; of Cyclops, 

 229; of Earthworm, 152; of Ano- 

 donta ; of Gi*asshopper, 263 ; of Leech, 

 166 ; of Sea Urehin ; of Sqaid, 348, 

 3.53 ; of Stai-fish, 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. 



PaUial line, 272. 



Palpiorer, 245. 



Paramoecium, ii. ; amis of, 11; cilia of, 

 8; contractile vesicle of, 11; cuticle 

 of, 9 ; digestive organs, 10 ; ectosarc, 

 9; endoplast, 12 ; endosarc, 9; footl 

 vacuole, 11; a?sophagus, 10; peri- 

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



Parieto-splanchnic ganglia, 288. 



Patagium, 2.tO. 



Pearly layer, 273. 



Pedal ganglia of Anodonta, 246. 



Pcilicellarias 58, 73, 84. 



Pen of Squid, 335, 363, 368. 



Penis of Leech, 166. 



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



Pericaitlium of Anodonta, 274, 281, 293 ; 

 of Crab, 192 ; of Squid, 343. 



Pericardium of Starfish, 71. 



Peri-hjemal vessels of Starfish, 71, 72, 

 77. 



Periproct of Sea Urchin, 85. 



Perisarc, 32. 



Perisoma, 57. 



Peristome of Crab, 179; of Paramoe- 

 cium, 10 ; of Vorticella, 14 ; of Sea 

 Urchin, 84 ; of Stai-fish, 63, 68. 



Periviscei-al Fluid, 143. 



Pharynx of Earthworm, 143, 158; of 

 Leech, 163, 164. 



Pleopod of Crab, 171 ; of Lobster, 187. 



Pleura of Crab, 173; of Lobster, 187. 



Plutens of Sea Urchin, 110. 



Podical plate, 2.53. 



Polar globule, 319. 



Polian vesicle, 69. 



Postscutellum, 247. 



Prescutam, 247. 



Principal axis of egg, 103. 



Prismatic layer, 273. 



Proboscis, 160. 



Pronotum, 246. 



ProjxKlite, 176. 



Prostate gland, 350, 352. 



Pi-ostemum, 247. 



Prothorax, 246. 



Proventriculus, 261. 



Protopodite, 172, 175. 



Pseudopo<lia, 4. 



Pulvillus, 242. 

 I Pupil of Squid, 3.58. 

 ; Pyloric coeca of Crab, 201 ; pouch of 

 i Crab, 200 ; sac of Starfish, 64. 



Racemose vesicle, 70. 



Kachis, 57. 



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



Radula of Sea Urchin, 96 ; of Squid, 

 357. 



Receptaculum seminis, 151. 



Rectum of Anotlonta, 274, 284, 286 ; of 

 Crab Zoea, 209 ; of Gi-asshopper, 262 ; 

 ofSquid, 338, 346, 371. 



Regeneration of lost parts, 36. 



Renal oi-gan of Anotlonta, 281, 282; 

 of Lamellibranch embrv-o, 329; of 

 Squid, 340, 341. 



Reproductive calycle, 49; oi-gans of 

 Anodonta, 284, 296; of Crab, 204, 

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

 worm, 149; of Grasshopper, 259, 

 263; of Hydi-o Medusa, 42; of 

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

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

 68. 



Respiratoiy organs of Crab, 195. 



Respiratoiy tree, 65. 



Resting stage of egg, IM, 321. 



Retina of Squid, 359. 



