Index 



Flexules, definition, 254. 



Franz, V., cited on periodic migra- 

 tions of schizopods, 142. 



Fregata aquila, figures of barbules, 

 408. 



Fregatidae (genus Fregata), feath- 

 ers, 311; aftershaft, 307; re- 

 frangent surfaces, 311; down, 

 315. 



Fringillidae, down, 381, 383. 



Frog^ The Movements and Reactions 

 of the Isolated Melanophores of, 

 167; bibliography, 172; chroma- 

 tophores, 167-172; melanophores, 

 167-172. 



Galbulidae, feathers, 374; down, 

 376; systematic position, 389. 



Gain, feathers, 338; down, 340; color 

 modifications, 341; relationships, 

 342; epiphyology, summary, 342. 



Galliformes, iiestling down, 260; 

 ventral ridge, 266; proximal 

 barbules, 267; aftershaft, 269; 

 feathers, 337; figures of barb- 

 ules, opp. 420. 



Gallinula, feathers, 350; down, 353. 



Gallus bankiva domestica, filoplumes, 

 261. 

 domesticus, feathers, 338; figures 

 of barbules, opp. 420. 



Gates, E. E., acknowledgment, 496; 

 cited on Oenothera, 506, 512. 



Gavia immer, feathers, 299; figures 

 of barbs and barbules, opp. 404. 



Gaviidae, feathers, 300. 



Geococcyx, shaft, 264; eyelashes, 

 274; feathers, 364; down, 365. 

 californianus, color modifications, 

 366; figures of barbules, opp. 

 432. 



Glareolidae, relationships, 324; feath- 

 ers, 356. 



Glycera alba, 198. 

 capitata, 198. 

 longipinnis, 198. 

 nana, 197. 

 rugosa, 197. 

 sp.(?) 3uv.(?), 198. 



Glyceridae, 197. 



Golden Gate Park Memorial Museum, 

 acknowledgment of material, 

 246. 



Goniada annulata, 198. 

 brunnea, 198. 



Goose. See Anseres. 



Gopher, California pocket, osteology, 

 451; myology, 462; muscles: 

 cheek-pouch, 462, thoracic limb, 

 463, illustrations, opp. 492, 494; 

 muscle groups, 481; volumetric 

 measurements in thoracic limb, 

 483; units of work performed 

 by muscles, 487. 



Goura, ornamental plumes, 272; 

 color modifications, 361. 

 coronata, down, 361; figures of 

 barbules, opp. 430; feathers, 

 360; figures of barbules, opp. 

 430. 



Grinnell, J., acknowledgment, 246. 



Gruidae, relationships, .'554. 



Gruiformes, flexules, 272; feathers, 

 348; down, 352; relationships, 

 353 ; epiphyology, summary, 354 ; 

 systematic position, 389; figures 

 of barbules, opp. 424, 426. 



Grus, ear coverts, 273; feathers, 350. 

 canadensis, feathers, 348; down, 

 352; figures of barbules, opp. 

 424. 



Guara (Eudocimus) ruber, figures of 

 barbules, opp. 412 ; figures of 

 down barbules, opp. 442. 



Giinther, A., cited on protozoan 

 fauna in stomachs of ruminants, 

 44, 48, 54. 



Gymnogyps californianus, 331; fig- 

 ures of barbules, opp. 416. 



Gypaetus, powder-down, 258. 



Gypogerani, feathers, 333; down, 

 334; relationships, 334. 



Gypogeranus serpentarius, feathers, 

 333; figures of barbules, opp. 

 416. 



Gyps, feathers, 335. 



fulvus, feathers, 336 ; do-\^ni, 336 ; 

 figures of barbules, opp. 416. 



Haematoderus, down, 382. 



Halcyon gularis, down, 375. 



Haliaeetus, feathers, 335. 



leucocephalus, feathers, 336; fig- 

 ures of barbules, opp. 418. 



Haliastur, feathers, 335. 



Halosydna californica, ISO. 

 carinata, 181. 

 insignis, 180. 

 inter rupta, 179. 

 lordii, 181. 

 pulchra, 179. 



Hansen, H. J., cited on Euphausia, 5. 



Hare, Belgian, 449 ; volume of muscle 

 groups, 485; units of work per- 

 formed by muscles, 487. 



Harmothoe crassicirrata, 182. 

 hirsuta, 182. 

 imbricata, 182. 



Harrison, E. G., cited on nerve fibers 

 of frog, 170. 



Hawk. See Accipitres. 



Hemipodia borealis, 198. 



Hermellidae, 227. 



Hermodicp pennata, 179. 



Heron. See Ardeae. 



Heterodonttts Francisci. The Anat- 

 omy of the Exoskeleton, 147; 

 bibliography, 163. 



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