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NEW YORK STATE MUSEUM 



almost at right angles, curving outward, upward and forward and 

 joining the hinge in an obtuse angle. Hinge with the characteristic 



Cy pr i car dell a norumbegae 



median tooth just beneath and in front of the beak on the left 

 valve. 



Shell substance thick, surface with regular concentric growth 

 lines and sometimes a vague radial fold in the postumbonal slope. 



Lower Devonic. Dalhousie, N. B. 



Cypricardella parmula nov. 



These are small shells of oval outline with an almost uniform 

 convexity, beaks well toward the front and very low umbonal 

 ridge. They are about one third longer than high and are espe- 

 cially noteworthy for the strong development of the umbonal teeth, 



Cypricardella parmula 



which are slightly curved ridges, the median one much the strong- 

 est, bounded by deep sockets and a more subdued tooth above and 

 below. 



There are no Cypricardellas of this type in the New York faunas 

 where they are chiefly characterized by sharp concentric lines and 

 strong umbonal ridge. Such shells as these are however very 

 closely similar to C. bicostata Krantz and C. elongata 

 Beushausen, 1 especially to the former. 



Lower Devonic. Moosehead lake, a little north of Soccatean 

 point, Me. 



1 See Beushausen's figures, op. cit. pi. n, fig. 5-14. 



