114 



PECTUNCULUS minimus. 



TAB. CCCCLXII — /«^. 5. 



Spec Char. Orbicular, convex, smooth ; hinge- 

 line straight, prominent at the extremities ; 

 margin not toothed. 



Very nearly Eequilateral, and almost as long as wide > 

 the hinge teeth are but 4 or 5 on each side ; the want of 

 teeth within the margin is connected with the plain 

 surface. 



Found at Ancliflf by the Rev. Mr. Cookson. It sel- 

 dom exceeds a quarter of an inch in length. 



PECTUNCULUS oblongus. 



TAB. CCCCLXXL— /^. 6. 



Spec. Char. Transversely oblong, inequilate^ 

 ral, rather convex, smooth ; sides obliquely 

 truncated ; margin not toothed. 



In one or two remarkable characters this resembles 

 the last, but it is less convex, and much broader J its, 

 size is nearly the same. 



Sent from Ancliff with the last. 



