I nili X. 



Passeriform birds, of arboreal 

 babit, list of, 299; of the 

 open, list of, 294. 

 Pearl, Raymond, cited, 87, 97. 



146,' 169, 175. 

 Periodicity in growth of Salpa 



chain, 167. 175. 

 Perophera, 78. 



Pfeffer, W., cited, 167. 168. 

 Plialacroma. 178. 183. 184, 185. 

 jotirdani, 17s. Is:;, 1S5; connect- 

 ing link, 1 7s. 

 porodictynm, ls4. 

 Ceratocorys, 178, 183, 185. 

 Phialidium, 22, 23. 

 gregarinm, 11. 

 languidum. 11. 

 lomae. 22. 

 tenne. -'.',. 

 variabile, 23. 

 virens, 23. 

 Pliialiura, 21. 

 bakeri, 21. 

 dnodecimale. 22. 

 Phialopsis. 2:1. 

 brownei, 22. 

 diegensis, 23. 

 Phialucium, 23. 

 Phyllopus integer, 314, 336. 

 Pleuromamma quadrungulata, 314. 



329. 

 Pleuromma quadrungulata, 329. 

 Polyembrvony, in Cyclostomata, 



227. 

 Polydontida, 48. 

 Polyorchidae, 14. 

 Polyorchis penicillata. 11. 



minnta. 11. 

 Polystyelids, 69. 

 Pontobdella muricata, 133. 

 Potential energy, in egg, 3. 

 I'ott, K., cited, 9. 

 Pratt, H. S.. cited. 419. 420. 

 Precipitation, effect of on den- 

 sity of water in ascidian 

 localities, 93. 

 Preliminary Report on the Hy- 

 drographic Work carried 

 on by the Marine Biologi- 

 cal Station of San Diego, 

 189. 

 Proboscidaetyla brevicirrata, 11. 

 Proboscis of (iyrocotyle. 367. 

 Prostate gland, in Gyrocotyle, 



400. 

 Protostigmata, in embryo of 



ascidians, 75, 79, 83. 

 Protozoan multiplication, 87. 

 Ptychogena, 13. 

 calif ornica. 13. 



Puget Sound, 94. 96; ascidiaL 

 species in, 66; density of 

 water. 92. 



Pustulopora, 256. 

 proboseidea, 256. 



Pyrophacus, 177. 



Quantitative observations on the 

 salpa chain, 156. 



Raymond, W. J„ 189. 



Receptaculum ovorum, in Gyro 

 cotyle, 396, 398. 



Regeneration of hvdranth and 

 holdfast, 205. 



Reibungstiefe, 201. 



Reighard. J., cited, 286, 287. 



Repetition, included in term, 

 nierism. SI. 



Repetitive basis for development 

 of Halocvnthia johnsoni, 

 78. 



Repetitive series, 147, 171. 



liVprudiU'i i\ -nans. in (ivro- 



cotyle, 395. 424; in Halo- 

 cynthia johnsoni, 68, 73. 



Revealing characters of color pat- 

 terns in birds. 291. 



Riddle, O., cited, 286. 



Rigden, Miss E. J., acknowledg- 

 ment. 356. 



Ritter. Wm, E., 1, 65; cited. 97, 

 147. 167. 



Robertson, Alice. 225. 



Salpa Chain, a Quantitative Study 

 of the Development of, in 

 Salpa fusiformis-runcinata, 

 145; summary, 173; bibli- 

 ography, 176. 



Salpa cylindrica, 166. 173. 



Salpa fusiformis-runcinata. 173; 

 asexual reproduction. 147; 

 bud-producing generation. 

 148; description of, 147; 

 sexual generation, 148; 

 solitary generation of, 147, 

 148. 

 pinnata, development of chain, 



152. 

 zonaria-cordiformis, 161, 167, 

 173. 



Salpae, budding. 147, 148. 



San (lemente Island. 190, 197. 



San Diego. Marine Biological As- 

 sociation, acknowledgment 

 to, 185. 

 bay, 66. 89, 94; density of 

 water. 196; region south of, 

 196 ; temperatures of water, 

 196. 

 region, Copepoda of, 313; Lep- 

 tomedusae of, 11 ; tempera- 

 tures of. 195. 



[476] 



