Index 



Eails, nestling feathers, 259. 



Eallidae, feathers, 350; down, 353; 

 relationships, 354. 



Rallus obsoletus, feathers, 350; down, 

 353; figures of barbules, opp. 

 424, of down barbules, opp. 444. 



Eamus (barb, secondary quill), defi- 

 nition, 251; taxonomic value, 

 386. 



Eat, brown, 449; volume of muscle 

 groups, 485; work performed by 

 muscles, 487. 



Eatitae, feathers, 284; rectrices, 

 268; aftershaft, 269; barbules, 

 271 ; epiphyology, summary, 295 ; 

 evolution suggested by epiphy- 

 ology, 295, 388; relationships, 

 388. 



Eeeves, E. M., 495. 



Ehamphastidae, feathers, 374; down, 

 376. 



Ehamphastus, down, 376. 



ariel, feathers, 374; figures of 

 barbules, opp. 438, of down 

 barbules, opp. 446. 



Ehea, barbules, 271. 



americana, feathers, 288; nestling 

 feathers, 289; figures of barb- 

 ules, opp. 398. 



Eheiformes, feathers, 288; relation- 

 ships, 289; epiphyology, sum- 

 mary, 290; figures of barbules, 

 opp. 398. 



Ehynchotus, feathers, 346. 



Eodents, habits, 449; osteology, 451; 

 myology, 462; muscles: cheek- 

 pouch, 462, thoracic limb, 463, 

 groups, 481, volumes, 485; de- 

 ductions from volumetric figures, 

 485; units of work performed, 

 487. 



Sabella elegans, 221. 



Sabellaria californica, 227. 

 cementarium, 227. 



Sabellidae, 221. 



Sabellides anops, 211. 

 auricula, 211. 



San Diego, Note on Medusan genus 

 Stomolophus from, 239. 



San Diego Region, The Schizopoda 

 of the, 1; A Study of the Occur- 

 rence and Distribution of the 

 Ctenophora of, 21; Vertical Dis- 

 tribution and Movements of the 

 Schizopoda of, 123. 



San Francisco Bay, New Syllldae 

 From, 235. 



Scalibregmidae, 221. 



Schizobranchia nobilis, 225. 



Schizopod, general structure of body 

 and appendages, 1; numbers in 

 surface hauls, 125, in hauls with 

 horizontal closing net, 126, with 

 vertical closing nets, 127; num- 



bers for each month, 129, 130; 

 seasonal occurrence, 128, 129, 

 130, 131, 140; distribution, af- 

 fected by salinity, 133, light, 

 133, 141. 



Schizopoda, terminology for ap- 

 pendages, 1, 2; eormopod, 1. 



Schizopoda, order Euphausiacea, 2, 

 4; key to genera, 5; order Mysi- 

 dacea, 2, 3. 



Schizopoda, The, of the San Diego 

 Region, 1; bibliography, 16. 



Schizopoda, The, of the San Diego 

 Region, Vertical Distribution 

 and Movements of, 123. 



Schuberg, A., cited on protozoa, 44, 

 46, 47, 53, 59, 60. 



Sciurus douglasi albolimbatus, 449. 



Sclerocheilus pacificus, 221. 



Scolecolepis alaskensis, 201. 



Scoloplos elongata, 199. 



Scopus, feathers, 318. 



Secretary bird. See Gypogeranus. 



Selasphorus rufus, feathers, 373; 

 color modifications, 378; figures 

 of barbules, opp. 436. 



Serpula columbiana, 225. 



Serpulidae, 225. 



Shaft, definition, 251. 



Shagreen, 149. 



Shark. See Heterodontus francisci. 



Sharp, E. G., 43. 



Shull, G. H., cited on inheritance, 

 506, 512. 



Sialia mexicana occidentalis, filo- 

 plumes, 261, 262. 



Sigalion pourtalesii, 183. 



Sigalionidae, 183. 



Speotyto, powder-down, 258. 



Sphenisciformes, shaft, 264; reduc- 

 tion of remiges, 264; rectrices, 

 269; feathers, 296; relationships, 

 298; epiphyology, summary, 298; 

 figures of barbs and barbules, 

 opp. 402. 



Spheniscus mendiculatus, feathers, 

 297; figures of down barbules, 

 opp. 440. 



Spio acuta, 199. 



Spionidae, 199. 



Spirabranchus quadricornis, 226. 



Spizaetus, feathers, 335. 



Squirrel, California, ground, 449; 

 volume of muscle groups, 485; 

 work performed by muscles, 

 487. 

 red, 449; volume of muscle groups, 

 485; work performed by muscles, 

 487. 



Stark, M. B., cited on inheritance, 

 513. 



Stauronereis moniloceros, 197. 



Steganopodes, feathers, 307; rela- 

 tionships, 315; interrelations, 



[527] 



