Fossil crayfishes, 316 FOSTER, Dr. M., referred to, 110 France, consumption of crayfish in, 10 Function, 22 G. _Galaxidæ_, 315 _Gammarus_, 323 Ganglion, 103, 105 Ganglionic corpuscle, 87, 103 Gastric mill, 53 Gastrolith, 29, 347 chemical composition, 349 Gastrula, 211 GAY, quoted, 356 Genus, 249 Geographical distribution, see Distribution GERBE, M., quoted, 350 Germinal disc, 209 layer, 206 spot, 133 vesicle, 133 GERSTFELDT, Dr., quoted, 290 Gills, see Branchiæ GIRARD, quoted, 356 GORUP-BESANEZ, quoted, 353 Green-gland, 83, 353 development of, 224 GROBBEN, Dr., quoted, 354 Growth of crayfish, 31, 349 Guanin, 82, 353 Gullet, see Œsophagus GÜNTHER, Dr., quoted, 315 H. HAGEN, Dr., quoted, 305, 312 _Haplochitonidæ_, 315 HARVEY, quoted, 5 Head, see Cephalon Hearing, organ of, 116 Heart, 27, 71 development of, 224 HELLER, Dr., quoted, 298, 330 Hepatic duct, see Bile duct Hind gut, 61 development of, 214, 223 Histology, 176 _Histriobdella_, 356 _Homaridæ_, 263 {368} _Homarina_, 261 _Homarus_, 13, 42, 257, 332 Homology, homologous, homologue, 148 _Hoploparia_, 342 Hypoblast, 211 I. _Idothea_, 323, 334 Impregnation, 135, 350 Integument, 50 Interseptal zone, 183 Intestine, 29, 61 Ischiopodite, 165 J. Japanese Crayfishes, 313, 314 Jaws, 23 JOHNSTON, J., quoted, 42 K. KESSLER, quoted, 298, 304 Kidney, see Green gland KLUNZINGER, referred to, 330 L. Labrum, 51 development of, 218 LAMARCK, referred to, 4 LEREBOULLET, quoted, 353 Legs, ambulatory, 168 LEMOINE, referred to, 353 LEYDIG, referred to, 115, 353 Liver, 30, 64 development of, 223 nature of secretion, 352 Lobster, common, see _Homarus_ Norway, see _Nephrops_ Rock, see _Palinurus_ LOVÈN, referred to, 327 M. Machine, living, 128 M^CINTOSH, Dr. W. C., quoted, 288 Mandible, 23, 51, 170 development of, 214 MARTENS, VON, 306 _Mastodon mirificus_, occurring with fossil crayfishes, 316 Maxillæ, 23, 170 Maxillipedes, 23, 164 Medullary groove, 213 Megalopa stage of development, 283 Meropodite, 165 Mesoblast, 212 Mesoderm, 141 Mesophragm, 158 Metamere, 143 Metastoma, 51 Metope, 278 Midgut, 61 development of, 211, 214, 223 MILNE-EDWARDS, quoted, 13, 289 _Mollusca_, 284 Morphology, 46, 138 comparative, 230 Mortality of crayfishes, 128 Morula, 206 Mosaic vision, 122, 354 Motor plates, 189 Mouth, 51 MÜLLER, JOHANNES, referred to, 122 Muscle, 57, 90, 175, 181 development of, 224 histology of, 90, 181 Muscles of abdomen, 99 {369} of chela, 93 of stomach, 57 Myosin, 186 Myotome, 174 _Mysis_, 281, 323 _relicta_, origin of, from _M. oculata_, 327 Mysis stage of development, 280 N. Natural History, 3 Philosophy, 3 Nauplius stage of development, 215, 280 Nearctic province, 314 _Nephrops_, 259, 332