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NEW YORK STATE MUSEUM 



Of the 60 species listed by Hartnagel from the Cobleskill of 

 Schoharie county a comparatively limited number may be re- 

 garded as diagnostic of the formation. Among the corals and 

 hydrocorallines the genera Favosites and Stromatopora must be 

 regarded as of chief importance. The former is represented 

 by a species intermediate between F. niagarensis and 

 F . h e 1 d e r b e r g i a e , which was described by Schuchert as a 

 variety of the latter under the varietal name precedens 

 [fig. 7]. Its chief distinction is in the smaller size of the heads. 







% 



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Fio-. 7 Favosites helderbei-giae precedens. Fragment of rock with sec- 

 tion of heads, one reversed and one normal. Polished section of small head 



Among the brachiopods may be mentioned Orthothetes 

 interstriatus [fig. 8] , a small finely striated species ; 

 Chonetes jerseyensis [fig. 9] characterized by curved 

 striae in the adult ; Spirifer corallinensis [fig. 10] and 

 S. eriensis [fig. 11], both small species, the former with 

 obsolescent, the latter with few coarse rounded plications; 

 W h i t f i e 1 d e 1 1 a n u c 1 e o 1 a t a [fig. 12] , a small smooth 

 and nearly circular species ;Oamarotoechia? lamellata 

 [fig. 13], a broad species with deep sinus and lamellose striae; 

 and Camarotoechia litchfieldensis, [fig. 14] , a, 

 more robust form, with fewer and coarser plications. 



Among the pelecypods, Pterinea securiformis and 

 Tellinomya equilatera [fig. 15] are most abundant. 

 The former is a large smooth aviculoid, the other a nearly sym- 



