8a. Var. Mooreana .

(Pl. III. fig. 15.)

From Weston-super-Mare we have seen another costated Kirkbya, rather resembling the present species, but relatively much shorter and more subquadrate in outline, the height being two thirds of the length. The costation likewise is slightly different; and the subcentral pit takes more the form of a transverse slit. This may possibly be a distinct species; for the present we term it K. costata, var. Mooreana . It was collected by the late Mr. Charles Moore, of Bath.