INDEX. 



387 



45-48; nervous system of, 46-48; 

 ocellate of, vii ; ocelli of, 42; otocyst 

 of, 55; otolith of, 55; reproductive 

 calycle of, 49; reproductive organs 

 of, 42 ; stomach of, 41 ; sub-umbrella 

 of, 39 ; tentacles of, 40, 41, 44, 45 ; 

 umbrella of, 39 ; velum of, 39. 



Hydrorhiza, 32. 



Hydrotheca, 33. 



Hypodermis of Earthworm, 154. 



Ilium of Gi'asshoi>per, 262. 



Imbedding, method of, 26, 27. 



Incurrent ostia of Mytilus, 303 ; of Unio, 

 306. 



Ingluvies, 261. 



Ink Bag of Squid, 339, 378. 



Integument of Anodonta, 287; of Earth- 

 worm, 152, 154. 



Inter-ambulacral areaof Sea Urchin, 88; 

 of Starfish, 61 ; ossicles of Sea Urchin, 

 88, 89: ossicles of Starfish, 59, 61, 75. 



Inter-lamellar junctions of Mytilus, 301 ; 

 of Unio, 310. 



Inter-tentacular junctions of Mytilus, 

 301 ; of Unio, 307. 



Inter-radius, 57, 65. 



Inter-radial partition, 62; sutures, 87. 



Intestinal coecum of Crab, 201. 



Intestine of Anodonta, 284, 287; of 

 ci-ab. 201; of Zoea, 209; of Earth- 

 worm, 145, 159 ; of Grasshopper, 262 ; 

 of Leech, 163, 164; of Oyster em- 

 bryo, 329; of Sea Urchin, 92, 94 ; 

 of Squid, 339, 346 ; of Starfish, 65. 



Iris of Squid, 358. 



Ischiopodite, 176. 



Jaws of Squid, 348. 



Labial palpus of Anodonta, 276; of 

 Grassliopper, 245. 



Labium of Grasshopper, 245. 



Labrum of Crab Zoea, 210, 211 ; of Cy- 

 clops, 226 ; of Xauplius, 234 ; of 

 Gi"asshopper, 243. 



Lacinia of Gi-asshopper, 246. 



Lamellibranchs, xxvi, xxvii, xrviii (see 

 also Anodonta, Cyclas, Mytilus, Oys- 

 ter, Unio). 



Lamellibranchs, direction cell of, 319; 

 development of, xxviii ; gill of, 

 xxvii ; ectoderm of, 322 ; ear of, 329 ; 

 eye of, 329 ; segmentation of egg, 

 319 ; seminal fluid of, 313 ; sperma- 

 tozoa of, 314. 



Lasso cell, 34. 



Latei-al Spine of Zoea, 208. 



Leech, xvii ; annuli of, 160 ; blood ves- 

 sels of, 165 ; bi-ain of, 167 ; buccal 

 pouch of, 163, 164, cerebral ganglia 

 of, 167 ; colon of, 165 ; digestive or- 

 gans of, 163 ; eyes of, 165 ; gastric 

 ganglia of, 167; intestine of, 163, 164 : 

 mouth of, 161, 167; mucous glands 

 of, 162 ; nervous system of, 165, 166 ; 

 ovarj- of, 166; pharynx of, 163, 164; 

 proboscis of, 160; reproductive or- 

 gans of, 161, 162, 166; segmental or- 

 gans of, 162. 



Leech, stomato-gastric ganglia of, 167 ; 

 stomach of, 163, 164 ; testis of, 166 ; 

 vagina of, 166; vesicula seminales 

 of, 166. 



Leg of, Gi-asshopper. 240. 



Lens of Squid, 358, 359. 



Ligula of Grasshopper, 245. 



Lines of growth, 271. 



Lingual ribbon of Squid, 348. 



Liver of Anodonta, 284, 296 ; of Crab, 

 193, 194, 201; of Crab Zoea, 209; of 

 Squid, 344, 347. 



Lobster, xix, abdomen of, 186 ; anten- 

 nae of, 185, 189 ; antennulc of, 185, 

 189; anus of, 187; auditor}- organ 

 of, 190, 223; branchiostegite ' of, 188; 

 carapace of, 185; cephalothorax of, 

 185 ; cei-vical suture of, 185 ; epister- 

 num of, 187 ; eye of, 185, 189 ; max- 

 illa of, 189; maxilliped of, 189; 

 metastoma of, 189; pereiopod of, 

 188; pleopod of, 187; pleura of, 

 187; rostrum of, 185; sternum of, 

 186. 



Lobster, swimmeret of, 186, 188; tel- 

 son of, 186 ; tergum of, 185, 187. 



Macromere, 320. 



