INDEX TO GEOLOGY OF THE WATKINS AND ELMIRA QUADRANGLES 2g 



Strophalosia truiicata, I3^ 

 Stropheodonta cayuta, 15°, 18', 2o\ 

 24'. 



demissa, 2o\ 



inequistriata, 20^ 



mucronata, 24'. 



perplana ?7ar. nervosa, 20^ 24^ 

 Styliola fissurella, 5^ 7^ 9', 13\ 

 Styliola limestone, 5*. 



Taxocrinus ithacensis, 16*. 

 Tornoceras uniangulare, 13''. 

 Tropidoleptus carinatus, i8^ 19°. 



Undulations, 25^-26^ 



West Hill flags and shales, iS*-i6\ 

 West River shale, s'-?^- 

 Wiscoy shale, I8^ 



