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. 



Hyclrotheca, 33. 



Hypodermic of Earthworm, 154. 



Ilium of Grasshopper, 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-arabulacral area of 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 Uuio, 307. 



Inter- radius, 57, 65. 



Inter-radial partition, 62 ; sutures, 87. 



Intestinal coecum of Crab, 201. 



Intestine of Anodonta, 284, 287; of 

 crab. 201; of Zoca, 209; of Earth- 

 worm, 145, 159 ; of Grasshopper, 262 ; 

 of Leech, 163, 164; of Oyster em- 

 bryo, 329; of Sea Urchin, 92, 91 ; 

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



Iris of Squid, 358. 



Ischiopodite, 17'i. 



Jaws of Squid, 348. 



Labial palpus of Anodonta, 276 ; of 

 Grasshopper, 245. 



Labium of Grasshopper, 245. 



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

 clops, 226 ; of Nauplius, 234 ; of 

 Grasshopper, 243. 



Lacinia of Grasshopper, 246. 



Lamellibranchs, xxvi, xxvii, xxviii (sec 

 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. 



Lateral Spine of Zoea, 208. 



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

 sels of, 165 ; brain 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 ; 

 ovary 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, Grasshopper, 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; auditory organ 

 of, 190, 223; branchiostegite of, 188; 

 carapace of, 185; cephalothorax of, 

 185; cervical 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. 



