Index 



Heterodontus francisci, exoskeleton, 

 149; scale-types, 150: anchor, 

 155, caudal, 158, dorsal, 153, in- 

 different, 159, ventral, 150; vari- 

 ations in size, 160. 8ee also 

 Plaeoid scales. 



Hoactzin, 337. 



Hoge, M., cited on Drosophila, 501. 



Holliger, C. D., 447. 



Holmesiella, 14. 



anomala, 14; figures, opp. 18. 



Holmes, S. J., 167. 



Hooker, B., cited on amoeboid move- 

 ment in melanophores of frog, 

 172. 



Hooklets, definition, 258. 



Hormiphora palmata, 21. 



Hornaday, W. T., acknowledgment, 

 246. 



Hyalinoecia tubicola, 195. 



Hyde, R. R., cited on Drosophila, 

 513. 



Hydrocorax mindanensis, feathers, 

 370; down, 375; figures of barb- 

 ules, opp. 434, of down barb- 

 ules, opp. 446. 



Hydroides sp.(?), 226. 



Hylocichla guttata, filoplumes, 262. 



Hyporhacis, definition, 251. 



Icteridae, feathers, 381. 



Inheritance of Extra Bristles in 

 Drosophila Melanogaster Meig., 

 495. 



Inheritance, Mendelian, in Droso- 

 phila, 501. 



Integumentary structures of verte- 

 brates, taxonomic value, 247. 



Iridescence, feathers, 277 ; refrangent 

 surfaces, 277, 278, 311. 



Irrisor, down, ^374; color modifica- 

 tions, 477. 

 viridis, feathers, 370; figures of 

 barbules, opp. 434. 



Isocirrus sp.(?), 220. 



Isotricha, 46. 



Isthmus of Panama, closure since 

 Mesozoic times, 241. 



Jacamerops, down, 376; color modi- 

 fications, 377. 

 grandis, 374; color modifications, 

 378; figures of barbules, opp. 

 438. 



Jacana. See Parra spinosa. 



Jack rabbit, California, 449; volume 

 of muscle groups, 485; units of 

 work performed by muscles, 487. 



Jeffries, J. A., cited, 247. 



Kagu (mesite), of Madagascar, 337. 



Kofoid, C. A., 44; acknowledgment, 

 45, 175, 246, 448. 



Lagopus, white color, 276, 341. 

 lagopus, figures of barbules, opp. 

 420. 



Lamella, definition, 253. 



Laniee heterobranchia, 207. 

 Laonome oculifera, 222. 



punctata, 222. 

 Lari, feathers, 354. 

 Laridae, gray color, 275; feathers, 

 356; down, 358; relationships, 

 358. 

 Laro-limicolae, flexules, 272; feath- 

 ers, 354; down, 357; relation- 

 ships, 358; epiphyology, sum- 

 mary, 358; figures of barbules, 

 opp. 428. 

 Larus argentatus, feathers, 357. 

 occidentalis, feathers, 356; figures 

 of barbules, opp. 428. 

 LarA^ae, amphibian, 167, 168. 

 Ledge, definition, 252. 

 Leodice bianniilata, 193. 

 hawaiiensis, 194. 

 kobiensis, 193. 

 Leodicidae, 193. 

 Lepidasthenia gigas, 183. 

 Lepidonotus coeloris, 182. 

 robustus, 182. 

 squamatus, 181. 

 Leptotilus, down, 270. 



dubius, feathers, 319; figures of 

 barbules, opp. 412. 

 Lepus californieus, 449. 



europaeus, 449. 

 Liff, J., cited on Drosophila factors, 



513, 515. 

 Limicolae, ear coverts, 273 ; feathers, 



354. 

 Lophoceros, feathers, 370. 

 Lophortyx, plumules, 257; ventral 



ridge, 266. 

 Lumbrinereis bifurcata, 196. 

 erecta, 196. 

 zonata, 196. 

 Lutz, F. E., cited on Drosophila, 513. 

 MacDowell, E. C, 495; cited on Dro- 

 sophila, 499, 506, 510, 512, 514 

 Macropygia, feathers, 460; down, 

 361. 

 tenuirostris, figures of barbules, 

 opp. 430. 

 Magelona longicornis, 206. 

 Magelionidae, 206. 

 Malacoptera, down, 376. 



fusca, feathers, 374. 

 Maldane disparidentata, 220. 

 sarsii, 220. 

 similis, 220. 

 Maldanidae, 219. 

 Mallard, albino, feathers, 279. 

 Marabou, source, 270, 319. 

 Mareca, feathers, 329; down, 329; 



figures of barbules, opp. 414. 

 Marila, feathers, 328. 

 Marphysa californica, 194. 



stylobranchiata, 194. 

 Mascha, E., cited on feather struc- 

 ture, 247. 



[523] 



