Index 



Peridinium, 72. 

 eerasus, 375. 

 cinctum, 71. 

 divergens, .344, 442. 

 grani, 344. 

 minutum, 375. 

 ovatum, 442. 

 pellueidum, 344. 

 steinii, 442. 



Phacus longicauda, 75. 

 pleuronectes, 72. 



Phalacroma rapa, 344. 

 rudgei, 344. 



Pholas, 384, 463. 



Phormidium, 38. 



Photosynthesis, 334, 335; photosyn- 

 thetic assemblage, 377. 



Phytoplankton, marine, ecological 

 study of, 330, 345; locations, 

 331, 413; components, 331, 332; 

 statistical values, 332; relative 

 abundance, 332, 334; seasonal 

 abundance, 332; localized abun- 

 ance, 333; collecting standards, 

 345; water currents, influence on 

 production, 345; rapid increase. 

 345; occurrence in connection 

 with copepoda, 429. 



Pier, at La Jolla, collections from, 

 of phytoplankton, 330, 331, 370, 

 376.448; temperature, 331 ; totals. 

 346, 347; of plankton, 417. 



Pinnularia acrosphaeria, 61. 



Pinole, California, locality for Teredo, 

 315. 



"Pioneer," U. S. S., 445, 448. 



Planarian, 112. 



Plankton, opportunities for develop- 

 ment, 11; effect of mountain 

 drainage and temperature, 12, 13 

 20, of light, 13; collecting sta 

 tions, 15, 16, 417; methods of col 

 lection, 18, 377, 416; net, 19 

 count, 23; identification of forms 

 24; type distinction, 27; fresh 

 water types, 28, 29; major groups 

 30, 31, 32; animal, plant, 47 

 hourly series, San Joaquin plank- 

 ton, 117; production factors, 120; 

 physiology, determination of, 

 122; reproduction, 122; river and 

 sewage forms different, 124; au- 

 tumnal maximum, 124; daily col- 

 lections best, 124; effect of lunar 

 light, 124 ; measured water method 

 of collection, 377; principal food 

 of Teredo, 395, 396, 397, 459, 

 467; diurnal migration of, 431; 

 importance of unbroken continu- 

 ity of collections, 432; samples 

 of, 445; seasonal changes in pro- 

 duction of, localised swarms, 448. 



Planktonts, by major groups, 31, 32, 

 112, 113. 



Platydorina eaudata, 72. 



Platyias quadricornis, 106. 



Pleodorina, 71. 

 californica, 72. 

 illinoisensis, 73. 



Pleurococcus, 46. 



Pleuronema, 82. 



Pleurostauron obtusum, 61. 

 parvulum, 48, 59. 



Pleurotrocha petromyzon, 106. 



Ploima, 90, 91, 106, 112. 



Plumatella, 112. 



Podophrya, 85. 



Podoplia, 420, 426, 429. 



Point Hueneme, California, 369, 371, 

 372, passim. 



Point Richmond, California, locality 

 for Teredo, 315. 



Polyarthra trigla, 103, 104; eggs, 104. 



Polychaete, 381. 



Polygonum amphibium, 15. 



Populus fremonti, 15. 



Port Costa, California, locality for 

 Teredo, 308, 312. 



Prorocentrum micans, 344, 345, 375, 

 376, 442. 



Prorodon, 82. 



Protozoa, 29, 32, 33, 66, 79, 114, 116, 

 117, 119, 450. 



Pseudodifflugia gracilis, 77. 



Pteromonas, 73. 



Ptygura brevis, 87. 



Puget Sound, 442. 



Pulses, vernal and autumnal, 26; re- 

 current, 39, 43, 47, 100, 102, 103, 

 114, 117; monthly, 45; of phvto- 

 pl.tnkton, 332, 333, 337, 345, 372. 



Pyrocystis lunula, 344. 



Pyxidium cothurnoides, 85. 



Quadrula symmetrica, 77. 



Quantitative and Statistical Study of 

 the Plankton of the San Joaquin 

 River and Its Tributaries in and 

 near Stockton, California, in 

 1913, 1-LMI2. 



Quantitative Studies on Inshore Ma- 

 rine Diatoms and Dinoflagellates 

 of Southern California in 1920, 

 369-378. 



Quantitative Studies on Marine Phy- 

 toplankton at La Jolla in 1919, 

 329-347. 



Ranunculus aquatilis, 15. 



Raphidiophrys elegans, 79. 



Raphidium, 40. 

 polvmorplium, 44. 



"Ratio of the Means," 421, 422, 423. 



Rattulus eapucinus, 105. 

 gracilis, 105. 



Rhabdostyla brevipes, 85. 



[482] 



