162 PAPERS, ETC. 



cation to Mr. Davidson suggested the specific name of 

 Terebratella Buckmanii for it, wliich I have mucli pleasure 

 in adopting. 



Terebratella furcata, Sow. and Moore. 



PI. I., figs. 8-10. 



Terehratula furcata, Sow. ; T. orhicularis, Sow. ; 



T. cardiian, Lamarck. 



Shell small, rounded — botli valves moderately convex ; 

 valves coarsely pllcated, varying in number, and may be 

 Seen on the inner side, bifurcating occasionally; surfiice 

 punetuated ; beak truncated ; foramen large ; loop doubly 

 attached. 



This little shell was originally figured by Sowerby under 

 the name of Terehratula furcata, but subsequently he con- 

 eidered it might be the young of Terehratula orhicularis, 

 Sow., the Terehratula cardium of Lamark, in which he was 

 followed by other naturalists. The T. cardium is found at 

 Hampton ClifFs, in association with this species, and from 

 the close resemblance it bears to it, might reasonably be 

 consldered its young form. Ilaving succeeded in opening 

 a beautiful example showing the interior of the shell, the 

 double attachment of the loop proved it to be a Terebra- 

 tella. The interlors may be seen by referring to pl. I., 

 figs. 9, 10. The profile shows the upper lamellaj of the 

 loop, after leaving the hinge plate, to be possessed of a pair« 

 of crural spurs. About the centre of the shell the lamellfe 

 are attached to an elevated mesial septum. The front of 

 the loop, as well as the reflected portion, is broad; and 

 projccting towards the opening of the shell, and on the 

 under side of Ihe lamellte, are a number of closely set 

 spiues. This shell is very rare at Hampton, owing to 

 which I have been unable to make any observations ou 



