Index 
Toxoglossa, 341. 
Trachydermon, 295. 
dentiens, 229. 
hartwegi, 295. 
raymondi, 229, 295. 
Trivia, 328. 
californica, 328. 
Trochidae, 311. 
Turbinidae, 309. 
Turbonilla, 315. 
franciscana, 222, 315. 
keepi, 316. 
Turris, 342. 
incisa, 342. 
perversa, 342. 
tabulata, 343. 
U. S. Bureau of Chemistry, acknowl- 
edgment, 101. 
U. S. Bureau of Fisheries, 2. 
[457] 
Urosalpinx, 335. 
cinereus, 223, 335. 
Veneracea, 268. 
Veneridae, 268. 
Venerupis, 272. 
lamellifera, 272. 
Volutidae, 339. 
Volvula, 346. 
cylindrica, 346. 
Woods Hole, water temperature, 55, 
99; salinity, 86; bottom charac- 
ters, 95. 
Xylotrya, 290; sp., 290. 
Yoldia, 248. 
cooperi, 248. 
ensifera, 249. 
Zirfaea, 289. 
gabbi, 225, 243, 289. 
Zittell, ‘‘ Textbook of Palaeontology,’’ 
208. 
