1876.] 09 [Hall. 



ITTICA SLATE AND HUDSON RIVER. (Mathial, III.) 



Chaetetes lycoperdon, Canoe valley. 



Glyptocrinus decadactylus, * " " 



Graptolithus, 



Strophomena, " " 



Triarthrus beckii,* Nittany valley. 



Kogers, p. 818, gives the following, also : 



Agnostus lobatus, Lingula quadrata, 



Ambonychia bellistriata, Modiolopsis modiolaris, 



" radiata, Murchisonia gracilis, 



Avicula insueta, Orbicula, 



Belleroplion bilobatus, Ormoceras crebriceptum, 



Conularia trentonensis, Orthis lynx, 



Cyrtolites ornatus, Orthoceras vertebrale, 



Endoceras proteiforme, Pleurotomaria bilix, 

 Graptolithus pristis, " aubconica, 



Heterocrinus, Rhynconella increbescens, 



Lingula curta, • Stictopora acuta. 



TRENTON LIMESTONE. {Matinal, II.) 



Calymene senaria, Nittany valley. 



Chtetetes lycoperdon,* " and Kischicoquillas valley, 



and Northampton county. 



Crytoceras trentonensis Nittany valley. 



Dalmania gigas,* " " 



Eschapora recta, Kischicoquillas valley. 



Leptsena sericea,* " and Nittany valley. 



Lingula riciniformis, Nittany valley, 



Orthis testudinaria,* Nittany and Kischicoquillas valley. 



' ' tricinaria, " valley. 



" pectinella,* Northampton county. 



Stictopora elegantula Kischicoquillas valley. 



Strophomena alternata,* Nittany and Kischicoquillas valley. 



" deltoidea, Nittany valley. 



Trinucleus concentricus, * " and Kischicoquillas valley. 



BLACK RIVER LIMESTONE. {Matilial, II.) 



I 



Chaetetes lycoperdon, Canoe valley. 



Gonioceras anceps, " " 



Murchisonia angustata, Kischicoquillas valley. 



* Those marked * are mentioned by Rogers. 



