U S GEOLOCJCAL SURVEY OF THE I'KRRlTOFaES 



PLATE L>an 



T Sinclair i Sonliitli Thilada 



1-3,TESTUD0 CULTRATUS. 4 .3CIURU3 WORTMAI-41 . 5-6, S . BALLOVIANUS . 7-10 MENISCOMYS HIPPODUS. 

 llMT,inLOPHUS.i2-15 M CAVATUS 16-17, M.NITENS . 18-21 CASTOR PENINSULATUS , 22 .C.GRADATUS. 



