GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 325 



22 Megambonia bellistriata Hall 1 



23 M. lamellosa Hall 1 



24 Palaeopinna flabellum Hall 



■Gastropoda 



25 Diaphorostoma ventricosum Conrad^ 



26 Strophostylus expansus Conrad 1 



27 Platyceras tortuosum Hall 1 



28 P. nodosum Conrad 1 



29 P. subnodosnm Hall 1 



30 Cyrtolites ? expansus Hall 1 



Tteropoda 



31 Connlaria lata 



Cephalopoda 



32 Orthoceras arenosum Hall 



I Fossils of the Schoharie grit 



A large number of specimens described from the Schoharie grit 

 in the Palaeontology of New York, were obtained from outcrops 

 near Clarksville and Knox in Albany county. At Clarksville. and 

 for several miles in that vicinity, are found the best exposures of 

 the formation. It consists of " a very impure limestone, which 

 weathers at the surface to a dark buff spongy sandrock, contain- 

 ing an abundance of characteristic fossils.'' 2 It is quite sharply 

 separated from the Esopus, but grades upward into the Onondaga. 

 Of the following list only those starred (*) have been listed from 

 the Schoharie region. Those marked with a dagger (f) pass up- 

 ward into the Onondaga limestone or higher. The double dagger 

 (|) indicates that the species is also known from the Decewville 

 beds of Canada. 

 Bryozoa 



1 Ptiloporina sinistralis (Hall i(- Simpson) 



2 Ischadites bursiformis Hall 



Brachiopoda 



3 Lingula ceryx Hall 



4 Crania aurora Hall 



5 Pholidops areolata Hall 



6 Rhipidomella peloris Hall 



7 *Rh. alsa Hall 



8 *Rh. mitis Hall 



9 $*fOrthothetes pandora (Billings) 



10 JfLeptaena rhomboidalis ( WilcJcens) 



11 jfStropheodonta demissa (Conrad) 



12 S. alveata Hall 



13 S. callosa rar. Hall 



1 Schoharie county, exact locality not known. 

 2 Darton, N. H. N. Y. State Geol. L3th Rep't. 1* ( .U. 1:243-41. 



