46 NEW YORK STATE MUSEUM 



agree more closely with the shell as it occurs in the Rochester shales of 

 New York than with the representatives of the species at Waldron Ind., the 

 latter having the plications less blunt and the sinus more pronounced. 



The species has a wide distribution in the Niagaran beds, and is listed 

 from some of the Guelph localities in Wisconsin. It has not been found in 

 the Canadian Guelph. These specimens do not approach Rhynchon- 

 ella pisa Hall & Whitfield, the only species of the genus recognized by 

 Whiteaves in the Guelph fauna of Ontario [op. cit. 1895. p. 63]. 



Camarotoechia (?) indianensis Hall 



Plate 4, fig. 26, 27 



Rhynchonella indianensis Hall, Albany Institute. Trans. 1863. 4:215 

 Rhynchonella indianensis Hall, N. Y. State Mus. 28th An. Rep't. 1879. 



p. 163, pi. 26, fig. 12-22 

 Rhynchonella indianensis Beecher & Clarke, N. Y. State Mus. Mem. 



1. 1889. p. 42, pi. 3, fig. 17-28 



This species is represented by a few specimens from the Rochester 

 and Shelby horizons. 



It, as well as C. (?) n e g 1 e c t a, is decidedly more common in the chert 

 nodules of the upper Shelby dolomite than at Rochester. In the lower 

 Shelby bed it is still less frequently observed. 



Camarotoechia (?) indianensis occurs freely in the Niagaran 

 at Waldron Ind., and at Louisville Ky., but has not been recorded in the 

 Niagaran beds of New York. 



RHYNCHOTRETA Hall. I 879 



Rhynchotreta cuneata americana Hall 



Plate 4, fig. 23-25 



Atrypa cuneata Hall (non Dalman), Geology of New York; rep't on fourth dist. 

 1843. table of organic remains 13, fig. 3, 4 

 For synonomy see Hall & Clarke, Pal. N. Y. v. 8, pt 2, p. 185 



In the upper Guelph of the Oak Orchard creek section a single normal 

 specimen of this shell was obtained, exhibiting the cuneiform outline, con- 

 cave cardinal slopes and angular plications curving outward toward the 



