Hall.l 



56 



[Jan. 1.5, 



County; Jit Orl)isonia and vicinity in Huntingdon County; and at Bell's 

 Mills in Blair County. 



From the Oriskany Sandstone at Orbisonia and vicinity. 



From the Lower Ilelderberg, at Orbisonia and vicinity, and at Mansing's 

 Quarry, Carbon County. 



From the Clinton Group, at McKee's ore bank, ^lifflin County ; at 

 ^Matilda Furnace, Mifflin County; at Orbisonia, in Huntingdon County; at 

 Bell's Mills, in Blair County; and at Hollidaysburg, in Blair County. 



From the Oneida Conglomerate at Port Clinton, Schuylkill County. 



From the Utica Slate and Hudson River group ; at Bellefoute, Centre 

 County; near Henrietta, Bedford County ; at Henrietta, Blair County. 



From the Trenton Limestone ; in the Kischicoquillas Valley, Mifflin 

 County ; at Bellefonte, in Centre County. 



From the horizon below the Trenton ; at Reedsville, Kischicoquillas 

 Valley. Mifflin County ; from near Bellefonte, Centre County ; and from 

 near Martinsburg, Blair County. 



The following list of genera and species shows the result of the season's 

 work. I have also included those mentioned by Prof. H. D. Rogers in the 

 First Survey, many of which I have been able to recognize in our limited 

 collection. All the species, except those of the Chemung have been col- 

 lected during the past summer. 



UPPER CHEMUNG (and Waverly). 

 Orthoceras, 



Actinocrinus, 



Aristozoa, 



Bellerophon, 



Carina hamiltonge, 



Cyrtina hamiltoneusis, 



Cystids, 



Discina newberryi, 



Dithyrocaris, 



Euriptcrus, 



Fenestella, 



Lepidechinus, 



Lingula delia, 



Modiomorpha alta. 



Those specimens are from Warren and Venango Counties, from J F. 

 Carll, and F. A. Randall. 



Platyceras, 



Productella boydii 



" costatula. 



" striatula, 



Rhynconella contracta, 

 Spirifer alta, 



" disjuncta, 

 Streptorynchus chemungensis. 



• Athyris angelica, 



" polita, 

 Atrypa spinosa, 

 Discina newberryi, 

 Gramnysia, 



CHEMUNG. (Vergent, VIIL) 



Productella lachrymosavar. stigmata, 



" striatula, 



Rhynconella orbicularis, 

 Spirifer disjuncta,* 

 Streptoryncluis chemungensis, * 



* Those marked * are mentioned by Rogers. 



