104 , PROCEEDINGS OF THE ACADEMY OF [1884. 



NOTES ON TERTIARY SHELLS. 

 BY OTTO MEYER. 



In the Proceedings of the Academy of Natural Sciences, Phila., 

 1879, pp. 217-225, A. Heilprin gave in an essay, well worthy of 

 perusal, a review of those species of the American Tertiary which 

 had been hitherto compared and identified with European ones, 

 and then identifies the following : ^ — 



Cardita imbricata Lam, = Cardita rotunda Lea. 



Gardita planicosta Lam. = Cardita planicosta Lam. (Conr.). 



Gorbis lamellosa Lam. = Gorbis lirata Conr, 



Trochita trochiformis Lam, = Trochita trochiformis Lea. 



Gyprsea elegans Defr. = Gyprsedia fenestralis Conr. 



Actseon simulatus Sow. = Tornatella bella Conr. 



Niso terebellatus Lam. = Pasithea umbilicata Lea. 



I have seen and examined man^^ American species in the 

 museums of New York and New Haven, but my observations are 

 chiefly derived from material of my own collection, consisting of 

 several hundred German Oligocene species in addition to numerous 



^ Here are omitted all identifications, where Heilpriu has any doubt, or 

 which are not obtained by a direct comparison of specimens ; of such are 

 the following: — 



Ostrea divaricata Lea, compared with Ostrea flabellula Lam. 

 Pecten JDeshayesi Lea,, " " Pecten opercularis Jjam. 



Gar dium Nicolleti Conr., " *' Cardium semigranulatum Sow. 



Corbula oniscus Conr., " " Corhula rugosa Lam. 



Cylichna galba Conr., " " Bulla BroccM Bronn. 



Tornatella pomilia Conv., " " Tornatella inflaia Feruss. 



Pyrula penita Conr., " " Pyrula nexilis Lam. 



Cancellaria tortipUca Conr., compared with Gancellaria evulsa Brand. 

 Sigaretus decUvus Conr., ) ( Sigaretus canaliculatus 



Sigaretus bilix Conr., < i Sow 



Solarium ornatum Lea, compared with Solarium canaliculatum Lara. 

 Pleurotoma nodo carinata Gabb, compared with Pleurotoma denticula 



Bast. 

 Mesostoma rugosa Heilpr., compared with Mesostoma grata Desh. 

 Melania Claibornensis Heilpr., " " Melania mixta Desh. 



