16 



ATRYPA oblonga. 



TAB. DCXVIL— ^g-. 3. 



Spec. Char. Oblong,, very convex ; edge obtuse ; 

 the middle of each valve longitudinally plan o- 

 sulcate ; (surface fimbriated ?) beak small. 



W E have seen but one specimen of this apparently distinct 

 species ; it is from Queen's County. 



ATRYPA fimbriata. 

 TAB. DCXVIL— ^g^. 4. 



Spec Char. Orbicular, becoming transversely oval 

 by age, depressed ; the middle of each valve a 

 little flattened longitudinally; surface uneven, 

 imbricated and striated. 



Syn. Spirifera fimbriata. Phillips, loc. cit. 220. 



From the mountain limestone of Kendal in Westmore- 

 land. The specimens do not well agree with the descrip- 

 tion given by Prof. Phillips o^ Sp. fimbriata ; but they are 

 considered to belong to that species by Mr. Gilbertson, in 

 whose cabinet they are. 



