161 



Porcellana, Klein. Type P. ( Gyp.} argus, Linn. 



Luria, Jouss. Type L. (Gyp.) lurida, Linn. 



Luponia, Gray. Type L. (Gyp.) Algoensis, Gray. 



Cypneovula, Gray. Type C. Gapensis, Gray. 



Zonaria, Jouss. Type Z. ( Gyp.) zonata, Chem. 



Adusta, Jouss. Type A. (Gyp.) adusta, Chem. = C. onyx, 

 Linn. 



Erronea, Troschel. Type E. (Gyp.) errones, Linn. 



Stolida, Jouss. Type S. (Gyp.} stolida, Linn. 



Cribraria, Jouss. Type C. (Gyp.) cribaria, Linn. . 



Naria, Gray. Type N. (Gyp.) irrorata, Sol. 



Basterotia, Bayle MSS. (Fossil). Type B. (Gyp.) leporina, 

 Lam. 



Ponda, Jouss. Type P. (Gyp.) achatina, Sol. = ventriculus, 

 Lam. 



Monetaria, Troschel. Type M. (Gyp.) moneta, Linn. 



Erosaria, Troschel. Type E. (Gyp.) erosa, Linn. 



Staphyloea, Jouss. Type S. (Gyp.) staphylcea, Linn. 



Tessellata, Jouss. Type T. (Gyp.), tesseMata, Swn. 



Ipsa, Jouss. Type L (Gyp.) Childreni, Gray. 



Cyprsedia Swainson (Fossil). Types C. ( Gyp.) cancellata, Swn.; 

 C. Adamsoni, Gray. 



Pustularia, Swainson. Type P. (Gyp.) cicercula, Linn. 



Nuclearia, Jouss. Type N. (Gyp.) nucleus. Linn. 



Jenneria, Jouss. Type J. (Gyp.) pustulata, Lam. 



Pustula, Jouss. Type P. (Gyp.) radians, Lam. 



Triviella, Jouss. Type T. (Gyp.) oniscus, Lam. 



Trivia, Gray. Type T. Europaea. Mont. 



Niveria, Jouss. Type N. ( Trivia) nivsa, Gray. 



Trivirostra, Jouss. Type T. ( Trivia) scabriuscula , Gray = T. 

 oryza, Lam. 



No objection can be raised to any plan of grouping that will 

 aid the student in his study of this family, but when it comes to 

 giving each group a title, as has been done in this instance, there 

 is an unnecessary swelling of the already too large list of generic 

 names. 



In my catalogue, published in 1869, I followed the Messrs. 

 Adams, with the addition of the genus Gaskoinia, proposed by 



