850 



HISTORICAL GEOLOGY. 



from the Benton group in Kansas. Species of Compsemys occur in the 

 Laramie beds at Judith Kiver and elsewhere, and also of Trionyx and Plasto- 

 menus. Adocus beatus Leidy, A. punctatus Marsh, A. agilis Cope, are New 

 Jersey species. 



1423-1429. 



1425 



BiED. — Fig. 1423, Hesperornls regalis, skeleton (x^) ; 1424, left lower jaw, top view (x^) ; 1J25, same, sidevlew; 

 1426, tooth (x4> ; 1427, 20th dorsal vertebra, side view (x^) ; 1428, same, front view ; 1429, pelvis (x|) ; a, 

 acetabulum ; il. ilium ; is, ischium ; p, pubis ; p' , post-pubis. Marsh. 



