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Show 358 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [May 20, Eulima elegantissima, for which he misquoted Montagu, appears to be E. polita. Not O. lactea of d'Orbigny, nor of Dunker, nor of Angas. This common species is consequently variable as regards the straight or oblique direction of the ribs, as well as the comparative breadth of the shell. The pillar has occasionally a tooth-like fold. 37. ODOSTOMIA SINUOSA \ Jeffreys. (Plate XXVII. fig. 1.) S H E L L resembling a short pyramid, rather thin, semitransparent and glossy: sculpture, numerous, fine, flexuous and close-set longitudinal ribs, arranged obliquely, and commencing abruptly at the top of each whorl, and not continued below the periphery; there are about 25 on the last whorl; the first or nuclear whorl is, as usual, quite smooth : colour white: spire rather short, and ending in a sharp point: whorls 8 (exclusive of the nucleus), convex and rapidly enlarging ; the last occupies more than two fifths of the shell: suture narrow and oblique : mouth irregularly rhomboidal, equal in length to between one third and one fourth of the spire : outer Up inflected at the top, gently curved in the middle, and semicircular at the bottom : inner lip expanded and thickened : tooth or columellar fold slight but distinct. L. 0*175. B. 0*05. 'Porcupine' Exp. 1870: Med. St. Adventure Bank. A single specimen. Distribution. Mediterranean (Italian Exp.), off west coast of Africa ('Talisman' Exp.); 681 fms. Allied to O. lactea, but differs in its more conical and less cylindrical shape, being proportionally broader at the base, and the ribs are more decidedly flexuous and oblique. In Chemnitzia obliquata, of Philippi, the whorls are fewer and more tumid. 38. ODOSTOMIA PUSILLA, Philippi. Chemnitzia pusilla, Phil. Moll. Sic. ii. p. 224. t. xxviii. f. 21. O. pusilla, B. C. iv. p. 167, v. p. 215, pi. lxxvi. f. 4. ' Porcupine' Exp. 1870 : Atl. St. Vigo B.; Med. 50, Adventure Bank. Distribution. Birterbuy Bay, W . Galway (Walpole), British Channel and South of England, Atlantic coasts of France, throughout the Mediterranean and Adriatic, and Madeira ( Watson); 10-100 fms. Fossil. Pliocene: Biot, Italy. Post-tertiary : Morea and Rhodes. On further consideration I must hesitate in considering this species, which I described and figured under the above name, as that of Philippi. The size given by him is much smaller, the ribs are said to be set obliquely, and he noticed transverse or spiral striae, which my species does not possess. Judging from the excellent figure (plate 21, fig. 12) of "Turbonilla gradata, Monterosato," in the ' Mollusques du Roussillon ' of Messrs. Bucquoy, Dautzenberg, and Dollfus, which represents a variety of the present species, I am inclined to adopt the latter name. It is certainly distinct from O. lactea and its varieties. 1 Full of curve?. |