INDEX. 
Epistoma, 155 
Epithelium, 140, 177 
Equus excelsus, occurring with fossil 
crayfishes, 316 
Eryma, 341 
Evolution of crayfishes, 331 
Excretion, organs of, 82 
Exopodite, 145 
Exoskeleton, 17 
chemical composition, 347 
Eye, 118 
compound, 122 
development of, 225 
Eye-stalk, 24, 173 
development of, 214 
; F. 
Family, 252 
Fat-cells, 180 
Fibre, muscular, 185 
Fibril, muscular, 185 
Figian Crayfishes, 306 
Filament, muscular, 185 
Filter of stomach, 58 
Flagellum, 167 
Food-yelk, 206 
Foot-jaws, see maxillipedes 
Forceps, 22 
Foregut, 61 
development of, 213, 222 
Fossil crayfishes, 316 
Foster, Dr. M., referred to, 110 
France, consumption of crayfish 
in, 10 
Function, 22 
G. 
Galaxide, 315 
Gammarus, 323 
Ganglion, 108, 105 
Ganglionic corpuscle, 87, 103 
367 
Gastric mill, 53 
Gastrolith, 29, 347 
chemical composition, 349 
Gastrula, 211 
Gay, quoted, 356 
Genus, 249 
Geographical distribution, see Dis- 
tribution 
GERBE, M., quoted, 350 
Germinal disc, 209 
layer, 206 
spot, 133 
vesicle, 133 
GERSTFELDT, Dr., quoted, 290 
Gills, see Branchiz 
GIRARD, quoted, 356 
GoruUP-BESANEZ, quoted, 353 
Green-gland, 83, 353 
development of, 224 
GROBBEN, Dr., quoted, 354 
Growth of crayfish, 31, 349 
Guanin, 82, 353 
Gullet, see sophagus 
GUNTHER, Dr., quoted, 315 
H. 
HAGEN, Dr., quoted, 305, 312 
Haplochitonida, 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, 175 
LHistriohdella, 356 
Homarida, 263 
