132 SUPPLEMENT TO THE CRAG MOLLUSCA. 
Carpita corsis, Phil. Crag Moll., vol. ii, p. 168, Tab. XV, fig. 2 a, (as Cardita 
corbis, var. nuculina). 
Localities. Cor. Crag, Sutton. Red Crag, Walton. Middle Glacial, Hopton. 
Living in the Mediterranean. 
A single valve is all that has occurred in the Middle Glacial. 
Carpita anceps, S. Wood. Crag Moll., vol. ui, p. 168, Tab. XV, fig. 2 ¢, d (as Cardita 
corbis, var. exigua). 
VENERECARDRIA ANCEPS, S. Wood. Catalogue, 1840. 
Locality. Cor. Crag, Sutton. 
In my ‘Catalogue’ of 1840 I gave this shell under the above specific designation, 
but in the ‘Crag Mollusca’ I placed it as a variety of C. cords, under the name of eaigua, 
supposing it to be identical with Dujardin’s Touraine shell of that name. My further 
examinations have induced me to revert to my views of 1840, and I have accordingly 
restored it as a species under the name of anceps. 
C. corbis (nuculina) is the only form that I have seen from the Red Crag, and this is 
from Walton, where it is not very abundant. Cardita coréis is given from the Red Crag 
at Waldringfield by Mr. Bell and by Mr. Jeffreys, but which of the two forms is referred 
to I do not know. Cardita corbis is the same as the shell now found living in the 
Mediterranean. 
Dujardin represents his xuculina as strongly radiated, and the exzgua as having 
somewhat oblique transverse ridges, but of the two Crag forms cordis, and anceps, it 1s 
the latter only which is strongly radiated, from which it would seem that 7f the Touraine 
and Crag shells are identical it is awceps which must be referred to nuculina, and cords 
to evigua. ‘The shape, however, of the shells would lead to the reverse of this reference, 
and I am, therefore, very doubtful whether there be any identity between the two Crag 
and the two 'Touraine shells. I think, therefore, that I do best and avoid confusion by 
reverting to my ‘Catalogue’ name of anceps for our present shell, rather than by referring 
it to either nuculina or exrgua. 
Among the synonyms of C. cordis I gave Cardita corbis, Nyst. ‘This I now believe 
to be incorrect, the Belgian Crag shell appearing to be different from either of the forms 
found in the English Crag and to correspond with the Middle Oligocene shell called 
Cardita levigata by Dr. Speyer ¢ Mittel. Oligocin. Sdéllmgen,’ p. 60, Tab. III, fig. 7). 
A shell called Woodia laevigata by Von Konen (‘ Mittel. Oligocin.,’ p. 108, Tab. VII, 
fig. 8, a—d) is probably the same, but this I have not seen as an English fossil, though 
