Wachsmuth, Charles and Frank Springer. The summit plates of Blastoids, 



Crinoids and Cystids, and their morphological relations. Plate IV 82 



White, Dr. Charles A. On new generic forms of Cretaceous Mollusca and 



their relation to other forms. Plate II 32 



On the Cretaceous Mollusca of Texas and their relation to those of other 

 portions of North America 39 



