Index 



TJlothrix, 46. 



United States Coast and Geodetic 



Survey, cooperation with other 



scientific organizations, 445. 

 Urocentrum turbo, 85. 

 Uroglena volvox, 75. 

 Urtica holosericea, 14. 

 U. S. Bureau of Fisheries, 4, 5. 

 Vampvrella, 78, 79. 

 Variations in the Pallets of Teredo 



navalis in San Francisco Bay, 



401-414. 

 Variations in the Shell of Teredo 



navalis in San Francisco Bay, 



293-328. 

 Volumetric data, 22, 26, 47, 51, 114, 



117, 124, 447. 

 Volvox aureus, 74. 

 tor, 74. 



Vorticella, 39, 84, 119. 

 longifilum, 84. 



Vrolik, cited, 350, 366. 



Wood, utilized as food by Teredo 

 navalis, 384, 385, by termites, 

 wood-boring beetles, and snails, 

 385 ; chemical considerations, 386 ; 

 analysis after digestion, 388- 

 392;' tables of, 390-391; role of, 

 in diet of Teredo, 395, 396, 397; 

 protection of, against Teredo at- 

 tack, 396, 397. 



Xanthidium, 64. 



Xylotrya gouldi, 456. 



Zirphaea, 384. 



Zooplanktonts, 29, 47, 452, 454. 



Zuider Zee, 350, 365. 



Zygnema, 64. 



ERE AT A 

 Page 399. For Reimarus, J. A. H. read Reimarus, H. S. 

 Page 460, line 15. For here in read here and in. 

 Page 470, column 2, line 2. For later read lateral. 



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