CRETACEOUS PERIOD. 



475 



Tuomey, from Alabama ; Hippurites Texanus Roemer, a species eight inches lon< 

 and four in diameter, from Texas; Caprotina Texana Roemer, from Texas. 



Figs. 752-757. 



Conchifers— Fig. 752, Exogyra arietina; 753, Ostrea Larva; 754, Exogyra costata ; 755, Gry- 

 phsea vesicularis ; 756, G. Pitcheii ; 757, Inoceramus problematicus. 



Figs. 758-764. 



64 



Gasteropods.— Fig. 758, Fusus Newberryi; 759, Fasciolaria buccinoides; 760, Aporrhais 

 Americana; 761, Margarita Nebrascensis ; 762, Nerinaja Texana; 763, 764,. Bulla speciosa. 



