OF CONCHOLOQV. 



93 



or 18 



REVIEWS. 



L— AMERICAN. 



Proceedings of the Academy of Natural Sciences of Philadel- 

 phia. July— August, 1865. 



Descriptions of New Species of Fossils, from the Marsh a V 

 Group of Michigan, and its supposed equivalent in other 

 States ; with Notes on some Fossils of the same age pre- 

 viously described, by prof. Alexander winchell. 



The following are the new 



Discina Gallaheri. 

 Producta gracilis. 



" duplicostata . 

 " Morbiliava. 



curtiroslra. 

 " dolorosa. 

 1 this flava. 

 Spirigera Missouriensis. 

 hiloba. 

 " Olriensis. 



Spirifera centronala. 



Sillana. 

 Spir iferina Clarksville nsis. 



binacuta, 

 Rhynchonella letraj. li/.r. 

 '• heteropsis. 



persinvrta.. 



species described : — 



Rhynchonella unica. 



(Retzia?) micropleura. 

 (Jentronella Allei. 

 O.itrea patercula. 

 Pterin ea, spinalala. 

 Pernopecten, nov. gen. 



" limatus. 



Pinna f Marshallensis. 

 My alii) a Lowensis. 

 Sanguinolites slrigatus. 

 Sang in nolaria rostrata. 

 Conularia Newberryi. 

 Bellerophon Whittlesey i . 

 Metoptoma undata 

 Pleurolomaria quinquesulcafa. 

 ( 'yrloceras Ilockf or dense. 



