388 



INDEX. 



Madrcporic body of Sea Urchin, 85 ; of 

 Starfish, 57, 69. 



Malpighian tube, 262. 



Mandible of Crab, 180; of CrabMega- 

 lops, 218; of Crab Zoea, 210, 211 ; of 

 Cyclops, 227 ; of Grasshopper, 211. 



Mandibular palpus of Crab, 181, '211. 



Maimbrium of Hydroid, 33; of Hydro 

 Medusa, 41. 



Mantle of Anodouta, 274, 286, 287, 288; 

 of Squid, 334, 362 ; cavity of Anodon- 

 ta, 286, 288, 290, 291; cavity of Squid, 

 334, 337. 



Maxilla of Crab, 176, 180, 196, 197 ; of 

 Crab Megalops, 218; of Crab Zoea, 

 210, 211; of Cyclops, 227 ; of Grass- 

 hopper, 246. 



Maxillary palpus, 246. 



Maxilliped of Crab, 175, 178, 196 ; of 

 Crab Megalops, 217, 219; of Crab 

 Zoea, 210 ; of Lobster, 189. 



Medusa Buds of Hydroid, 50. 



Medusa Ocellate, vii. 



Medusa stage of Campanularian Hy- 

 droid, viii. 



Megalops stage of Crab, 215. 



Mentum, '21.">. 



Meropodite, 176. 



Mesentery of Anodonta, 290. 



Me-<nlenii of Sea Urchin, 108. 



Mcsostcrnimi, '2 IS. 



Metamorphosis of Crab, xxi ; of Cy- 

 clops, xxii; of Grasshopper, 256 ; of 

 Sea Krchin, xiv. 



Meiasteruum, 248. 



Metastoma of Crab, 180; of Cyclops, 

 226 ; of Grasshopper, 243 ; of Lob- 

 ster, 189. 



Microraere, 321. 



Micropyle, 364. 



Mouth of Anodonta, 276, 284 ; of Crab ; 

 of Cyclops, 226; of Earthworm; of 

 Leech, 161, 167; of Sea Urchin, 129 ; 

 of Squid, 348, 355, 368; of Star- 

 fish, 57 ; of Hydroid ; of Hydro Me- 

 dusa ; papillae, 57. 



Mucous Glands, 162. 



Multiplication of Vorticella, 19. 



Muscles of Anodonta, 272, 273, 274, 

 290 ; of Larva, 329, 331 ; of Crab, 192, 

 195; of Earthworm, 143, 152, 154, 

 156; of Sea Urchin, 97, 98; of Star- 

 fish, 68. 



Muscles of Squid, 338, 355, 361. 



Muscular layer of Medusa, 1"), 48. 



Mytilus, gill of, 298; tentacles of, 300; 

 incurrent ostia of, 303 ; inter-lamel- 

 lar junctions of, 301 ; inter-tentacular 

 junctions of, 301. 



Nauplius stage of Cyclops, 234. 



Neck of Squid, 338. 



Nematocyst,34. 



Nervous system of Anodonta; of Crab, 

 205; of Earthworm, 116, 157; of 

 Grasshopper, 263 ; of Hydro Medusa, 

 46, 48 ; of Leech, 165, 166 ; of Sea 

 Urchin, 98; of Squid, 348, 353; of 

 Starfish, 70, 71. 



Nidamental glands of Squid, 338, 352. 



Nucleus, 320; of Amreba, 6; of Para- 

 mcecium, 12 ; of Vorticella, 19. 



Nutritive pole of egg, 104. 



Occipital foramen, 245. 



Ocelli of Grasshopper, 243 ; of Leech ; 

 of Hydro Medusa, 42. 



Occular plate of Sea Urchin, 85. 



Ocellate Hydro Medusa, vii. 



Odontophore, 356. 



CEsophageal commissure of Crab, 205. 



CEsophagus of Earthworm, 144, 159; 

 of Crab ; of Grasshopper, 261 ; of Sea 

 Urchin, 02, 94; of Squid, 346,357, 

 369 ; of Starfish, 68. 



CEsophagus of Paramoecium, 10; of 

 Vorticella, 18. 



CEsophageal glands of Earthworm, 144, 

 159. 



Ophthalmic artery, 192, 195. 



Orbital lobe, 170. 



Orifice of invagination, 107. 



Osculum, 23, 24. 



Ossicle ambulacra!, 58, 61, 76, 88, 89. 



Ossicle inter-ambulacral, 59, 75, 88, 89. 



Ossicle, cardiac, 190. 



