Index 



Rhinoglena frontalis, 106. 

 Rhizopoda, 75, 78, 112. 

 Rhizosolenia alata, 338. 



faeroensis, 338. 



hebetata, 338. 



longiseta, 61. 



obtusa, 338. 



robusta, 338. 



setigera, 338. 



styliforniis, 338. 

 Rhizota, 87, 112. 

 Rhopalodia gibba, 61. 



paralella, 61. 

 Richteriella, 40. 



botryoides, 44. 

 Ritter, Dr. Wm. E., 330. 

 Rivularia, 38. 

 Rotaria neptunia, 88. 



rotatoria, 86, 88, 89. 

 Rotifera, 20, 32, 86, 114, 116, 117, 



120', 332; eggs, 104. 

 Rumex salicifolius, 15. 

 Sagittaria, 14. 



greggii, 14. 



latifolia, 14. 



sanfordii, 14. 

 Salinity, 21; factor in growth of 

 Teredo, 298, 299, 307, 315, 317, 



350, 351; comparison with points 

 in and near Holland, 350, 365- 

 366; measurement of, 351-352; 

 effect on activity of Teredo, 353, 

 367; "lethal salinity," 357, 367. 



Salix fluviatilis, 15. 

 lasiolepis, 15. 

 nigra, 15. 



Salpingoeca, 75. 



San Clemente Island, 448. 



San Diego, California, 342,379,4456; 

 Marine Biological Station, 330. 



San Francisco Bay, survey of, 4, 5; 

 salinity of, 299, 302; locality for 

 Teredo navalis, 300, 301, 306, 

 313, 317, 350, 401, 408, 455; tem- 

 perature range of, 304. 



San Francisco Bay Marine Piling 

 Committee, acknowledgment, 294, 



351, 387, 397, 456. 



San Joaquin River, survey of plank- 

 ton in, 4; characteristics of, 6; 

 drainage area, 7 ; important tribu- 

 taries of, S; turbidity of, 10; 

 conditions near Stockton, 11; 

 light, 13; tide, 14; vegetation, 

 14 ; plankton collecting stations, 

 15, 16; plankton organisms in, 

 27; comparison with Illinois 

 forms, 32; waters productive of 

 plankton, 124; locality for Teredo 

 navalis, 350. 



San Joaquin Valley, forest areas, 8; 

 rainfall, 8; air currents, 13. 



San Pablo Bay, 301; locality for 

 Teredo, 313, 350, 408; Point, 301, 

 315. 

 Saxicava, 384. 

 Seenedesmus, 30, 38, 39, 40. 

 obliquus, 44. 

 quadricauda, 45. 

 Schizophyceae, 34, 35, 46, 112, 119. 

 Schmitt, Waldo K., acknowledgment, 



5. 

 Scripps Institution for Biological Re- 

 search, cooperation with other 

 scientific organizations, 330, 331, 

 369, 376, 413, 417, 445, 449. 

 Sc.hroederia, 40. 



setigera, 45. 

 Scirpus lacustris, 15. 

 Sciriopoda, 106. 

 Sedgwick-Rafter cell, 23. 

 Selenastrum bibrainum, 46. 

 Shells, of Teredo navalis, ridges, 296, 

 297,298,306; variations in auricle 

 of, 301, 309; surface sculpture 

 of, 311; color, 312. 

 Sida, sp., 108. 

 Silt, 10, 11, 13, 22, 25. 

 Skeletonema costatum, 338, 341, 374, 



441. 

 Some Tide Water Collections of Ma- 

 rine Diatoms Taken at Half-hour 

 Intervals near San Diego, Cali- 

 fornia, 413-416. 

 Sorastrum spinulosum, 46. 

 Sphaerophrya, 85. 

 Sphaerozosma vertebratum, 64. 

 Sphinetocystis librilis, 62. 

 Spirillum undula, 34. 

 Spirogyra, 62. 

 fluviatilis, 64. 

 majuscula, 64. 

 protecta, 63. 

 Spirostomum, 85. 



Spondylomorum quaternarium, 73. 

 Spondylosium depressum, 64. 

 Stanislaus River, California, 10. 

 Statistical Studies of Marine Dia- 

 toms of the San Diego Region 

 Collected by XJ. S. S. Pioneer in 

 Midwinter, 1923, 445-448. 

 Staurastrum, 63, 64. 

 alternans, 64. 

 cuspidatum, 64. 

 eustephanum, 64. 

 macrocercum, 64. 

 vestitum, 64. 

 Stauroneis anceps, 62. 



phoenicenteron, 59, 62. 

 Stentor coeruleus, 83. 

 niger, 83. 

 roeselii, 83. 

 Stephanodiscus, 61. 

 Stephanopyxis palmeriana, 338. 



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