Index 
II 
Page 
Tactile stimuli, reaction to, in embryos of Diemyctylus 
Tarr, R. S., on glacial erosion. 
Tetradium minus 
Theories of origin of eskers 
Topographic relations of eskers 
Topographic sheets 
Triplecia (Cliftonia) striata, sp. nov 
? Triplecia (Cliftonia) tenax, sp. nov 
Uncinulus schucherti 
Utica 
Valley terraces 
Valley trains 
Volvox family, relationships of Spondylomorum 
Lake Warren level 
Watkins, N. Y 
Wave-cut terraces in Keuka valley, older than the recession stage of Wis- 
consin ice 
Lake Whittlesey level 
241 
202, 206, 207 
311 
24 
23 
57 
81 
82 
99 
209 
176 
376, 392 
233 
280 
26, 49 
35 
277 
