Bibliography, etc.—The type specimen of Turbo lævigatus, Phil., has not been seen by me; but since there are some grounds for regarding the fossil, usually so described, as a Neritopsis, the identification becomes important. We must therefore fall back upon Phillips's figure, and upon such collateral evidence as, in the absence of description, may be available. Phillips in the early editions of the G.Y. considered Bean's specimen from the Dogger as identical with Nerita lævigata, Sow. (M. C. t. 217, fig. 1), which he regarded as a Turbo rather than a Nerita. This identification of Phillips has not been endorsed by subsequent writers. D'Orbigny believed that he recognized in Turbo lævigatus, Phil., Delphinula gibbosa, Thorent (Mém. S. G. Fr. 3, p. 260, pl. 22, fig. 10). D'Orbigny's figure, making due allowance for enlargement, is very similar to the one by Phillips.