Hall.] 60 [Jan. 15, 



Orthoceras miilticameratum,* Canoe valley. 



Pleurotomoria umbilicata, * " " 



Rogers, (p. 817) mentions the following, not as yet observed : 



Enoniplialus ungulatus, Opliileta levata, 



Maclurea matutina, Pleurotomaria nucleolata, 



' ' magna, Pleurotomaria turgida, 



Murcliisonia bicincla, Retapora stamiuea, 

 Leperditia ovata, " striata, 



Orthoceras tenuifillum, Rhynconella plicifera. 



CHAZY LIMESTONE. {Matinal, II.) 



Asaphus canulis,* Kischicoquillas valley. 



" marginalis, " " 



Orthis costalis, " " 



Orthoceras, " " 



Strophemena incrassata,* , " " 



LOWER LIMESTONES. CALCIFERODS. {Auroral, II.) 



Asai)hus Nittanj' valley. 



Euomplialus, Canoe valley. 



lUajnus, Nittany valley. 



POTSDAM SANDSTONE. (Primal, I.) 

 Scolithus linearis, Lehigh and Franklin counties. 



In the above list no mention is made of the organic animal remains of 

 the Coal Measures, no collections in these having been as yet systematically 

 made. Those observed by Prof. J. J. Stevenson in "Washington and 

 Greene Counties will be recorded in his forthcoming report of 1B75. 



An important collection recently sent in by Mr. Carll has not j'ct been 

 sufficiently studied to be included in the present notice. 



* Those marked * are mentioned by Rogers. 



