MOORE — ON NEW BEACHTOPODA, ETC. 



443 



of Terebratula fiirccda, but subsequently lie considered it miglit be 

 tlie young of Terebratula orhicularis, Sow., the Terebratula cardium 

 of Lamarck, in wbicli be 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 reason- 

 ably be considered its young form. Having succeeded in opening a 

 beautiful example showing the interioi of the shell, the double 

 attachment of the loop proved it to be a Terebratella. The interiors 

 may be seen by referring to pi. xiii., figs. 9, 10. The profile shows the 

 upper lamella of the loop, after leaving the hinge-plate to be pos- 

 sessed of a pair of crural spurs. About the centre of the shell the 

 lamellae are attached to an elevated mesial septum. The front of the 

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

 the opening of the shell, and on the under side of the lamellee, are a 

 number of closely set spines. This shell is very rare at Hampton, 

 owing to which I have been unable to make any observations on the 

 development of the loop as in Terebratella Buckmanii. The fact of 

 the shell under consideration proving to be a Terebratella at once 

 suggested the possibility that Terebratula cardium might also belong 

 to that genus ; and I learnt from Mr. Davidson that he could not 

 speak positively on this point, as the shell from which his interior 

 was figured was not clear of the matrix, and only partially exhibited 

 the loop. I have taken much trouble to establish the correct position 

 of the T. cardium ; and after the examination and dissection of many 

 specimens, am able to say that the loop, as figured by that gentle- 

 man, is correct. This species must therefore remain in its present 

 position, but the examples supposed to be its young forms will have 

 to be placed under Terebratella ; and, retaining Sowerby's original 

 specific name, must be called Terebratella furcata. Two species of 

 this genus are therefore added to British Jurassic beds, and the 

 Terebratula liemisphcerica, which was supposed to represent it in this 

 age, removed, I have obtained a portion of the interior of a small 

 brachiopod; showing a mesial septum, from the Upper Lias, near 

 Ilminster, which convinces me that the genus may also be found in 

 that formation. 



Terebeatulina. 

 Terebratulina radiata. Moore. PI. xiii., figs. 11-14. 



Shell small, nearly as broad as long ; thickest near the umbo, and 

 thinning gradually to the front and sides ; front rounded ; valves 

 convex, flattened, with numerous fine striations ; foramen large, 

 rounded ; area flattened ; the exterior of the ventral valve shows a 

 mesial depression, with a corresponding elevation in the interior of 

 the valve. The loop is short ; after passing the crura it forms a semi- 

 circular ring, slightly thickening in its centre. 



This little shell is not uncommon in the oolite of Hampton Clifis, 

 and is the first Terebratulina recorded in British Jurassic beds. In 



