REPORT OF THE STATE PALEONTOLOGIST I903 ' 243 



1.5mm in length, breadth and thickness. The largest measures 

 12mm by 23mm by 3mm. No spines are noted. The surface is 



very finely striated. 



C. yandellanus Hall 



A pedicle valve about 7mm by 12mm in length and breadth, from 



the lower Onondaga was identified with this species. The cardinal 



angles are very distinctly flattened. There are about 50 strong, 



rounded, radiating striae which are as strongly developed on the 



flattened area of the valve at the cardinal angle as on the rest of the 



shell. 



Chonostrophia jervisensis Schuchert 



The resupinate character is well preserved in all the specimens. 

 The striae are narrow with broad, rather flat interspaces where spe- 

 cially the very numerous and fine concentric markings are noticeable 

 under a glass. A pedicle and a brachial valve of average size 

 each measured 7mm by 12mm in length and breadth. This is one 

 of the most abundant brachiopods of the Lower Oriskany. It is 

 found more rarely in the Upper Oriskany, while one specimen only 

 represents it from the Upper New Scotland. 



Dalmanella concinna Hall 

 Represented in the Port Ewen beds by rather small specimens ; 

 they average 7mm by 6mm. They are often found as internal molds 

 and one valve is preserved as frequently as the other. 



D. perelegans Hall 

 Quite abundant and well preserved in the Coeymans and Upper 

 New Scotland. 



D. siibcarinata Hall 



Abundant, specially in the Coeymans, New Scotland and Lower 

 Oriskany, but is also well represented in the Becraft, Port Ewen, 

 Upper Oriskany and possibly in the Lower Onondaga. It is thus 

 seen that this very persistent species thrived equally well in clear 

 and muddy waters. Specimens of a Dalmanella similar to this, 

 species except in size are quite abundant in the Lower Onondaga. 

 The largest form observed measured io.5m.m by 13mm in length and 

 breadth. 



