GEOLOGY AND PALEONTOLOGY OF THE SCHOHx^IE VALLEY 325 



22 Megamboiiia bellistriata HaJU 



23 M. lamellosa Hall^ 



24 Palaeopinna flabelliim Hall 



Gastropoda 



25 Diapliorostoma ventricosum Conrad'^ 



26 Strophostylus expansiis ConratU 



27 Platyceras tortiiosmii Hall^ 



28 P. nodosum Gonra<P 



29 P. subnodosiim IlalU 



30 Cyrtolites ? expansiis HalU 



Pteropoda 



31 Coniilaria 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, Avhich 

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

 ing an abundance of characteristic fossils."^ 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 d Shnpsoii) 



2 Iscliadites bursiformis Hall 



Brachiopoda 



3 Llngula ceryx Hall 



4 Crania aurora Hall 



5 Pbolidops areolata Hall 



6 Rbipidomella peloris Hall 



7 *Rb. alsa Hall 



8 *Rb. mitls Hall 



9 t*fOrtbotbetes pandora {Billings) 



10 JtLeptaena rliomboidalis {Wilckens) '^ 



11 tfstropheodonta demlssa {Conrad) 



12 S. alveata Hall 



13 S. callosa var. Hall 



^Scbobarie county, exact locality not known. 



2Darton, N. H. N. Y. State Geol. 13tli Rep't. 1894. 1:243-4 k 



