Figs. 52-54. CRAX.-ENA sp. 



Pedicle, brachial and lateral views of a nearly complete specimen. 

 (W. M., No. 9716.) 



Chouteau limestone, Pcttis County, Missouri. 



Figs. 55-59. CRAN.ENA SULCATA n. sp p. 251 



55-57. Pedicle, brachial and lateral views of a very perfect speci- 

 men. 58-59. Brachial and anterior views of another example. 

 Cotypes. (W. M., No. 14250.) 



Salem limestone, Spcrgen Hill, Indiana. 



Figs. 60-66. CRAN^NA GLOBOSA n. sp p. 249 



Pedicle, brachial and lateral views of a very perfect internal cast. 

 Holotype. (W. M., No. 14249.) 



Upper Burlington limestone, Springfield, Missouri. 

 63-65. Pedicle, brachial and lateral views of another specimen. 

 66. View of the interior of a shell showing the brachidium. 

 (W. M., No. 14248.) 



Burlington white chert, Louisiana, Missouri. 



80 



