BRACHIOPODA. MOLLUSCA. TEREBRATULA. 143 



increasing in number as the shell widens. The interior bony pro- 

 cesses consist of two slender, curved, parallel prongs arising from 

 the base of the teeth of the upper valve. Height | inch, length 

 ■^■^ inch, breadth \ inch. 



I have as yet met with only one specimen of this shell of the 

 above dimensions, which was taken from the stomach of a cod- 

 fish. It appears to be everywhere rare, and is probably an in- 

 habitant of more northern seas, especially the region of New- 

 foundland. 



