MOORE — ON NEW BBACIIIOPODA, ETC. 
4i3 
of Tcrclmlula /areata, but subsequently he considcvcd it miglit bo 
the young of Terehratula orhicularls, Sow., the Terchratnla cardvum 
of Lamarck, in which he was followed by other naturalists. The 
T. cardium is found at Hampton ClitFs, 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 interior 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 laraellce 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 
lamellas 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 lamellae, 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 Terebrattda 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 Iris interior 
was figured was not clear of the matrix, and only partially exhibited 
the loop. I have taken mirch 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 figTored by that gentle- 
man, LS 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 furc'ata. Two species of 
this genus are therefore added to British Jurassic beds, and the 
Terebrattda 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. 
Teeebratulina radiata. Moore. PI. xiii., figs. 11-14. 
Shell smaU, nearly as broad as long ; thickest near the umbo, and 
thinning gi-adually to the front and sides ; front rounded ; valves 
convex, flattened, Avith 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 Cliffs, 
and is the first Terebratulina recorded in British Jurassic beds. In 
