Mr. T. Gray on a new species of Strombus. 429 relation to my L. a^assistria and sulcata ^ with which M. dc Koninck unites it) ; but as I there described the width as rather greater, and do not give the absolute dimensions of the fine stria), I hesitate to unite them without a comparison of specimens. Very abundant in a piece of the black upper carboniferous limestone of Derbyshire. {Col. University of Cambridge.) Lingula latior (M^Coy). Desc, Broad ovate anteriorly, gradually acuminated posteriorly ; moderately convex towards the beak, very gradually flattened towards the margins ; sides meeting at the beak at an angle of about 75° ; front wide, semielliptically rounded ; greatest width at about the middle of the length, from whence the posterior end is rapidly narrowed to the beak ; surface with fine, sharply defined, strong, close, elevated, obtuse, concentric striae slightly irregular from occasional branchings and inter-ruptions, crossed in parts by longitudinal microscopic stria). Length 41 lines, proportional width y^^^. Distinguished from the other described Carboniferous Lingula by the very wide ovate form of its anterior end, and the great comparative length and straightness of the posterior lateral edges, which, by their convergence at so small an angle, give the re-markable posterior attenuation or pointed beak, characteristic of the species. Not very uncommon in the black limestone over the main limestone of Derbyshire. {Col. University of Cambridge.) XLII. — On a species of Strombus in the Hunterian Museum at Glasgow. By Thomas Gray, Esq., Glasgow*. In the collection of shells bequeathed to the University of Glas-gow by the late celebrated Dr. William Hunter, and preserved in the museum which bears his name, there is one interesting species which deserves to be recorded. The specimen in question is a Strombus, belonging to that section of the genus of which S. vittatus and S. epidromis form part, and what is very remark-able, a sufficiently characteristic figure of it is given in the ad-mirable ' Historia Conchyliorum * of our countryman Dr. Martin Lister, published in London in 1685. The shell is engraved on * Communicated by the Autlior, having been read before the Natural History Society of Glasgow.
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