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Show 1884.] 'LIGHTNING'AND'PORCUPINE'EXPEDITIONS. 359 39. ODOSTOMIA DELICATA, Monterosato. Chemnitzia gracilis, Phil. Moll. Sic. ii. p. 137, t. xxiv. f. 11. O. delicata, Mooter. J. de Conch. 1874, p. 267. ' Porcupine' Exp. 1869 : St. 18, Donegal B. 1870 : Atl. 17. Distribution. Bundoran, Co. Donegal, with Circulus striatus (J. G. J.), Loire-Inferieure (Cailliaud), Gulf of Gascony (de Folin), Mediterranean from Spezia to Alexandria, and Adriatic; 18-120 fms. Not Turbo gracilis of Broechi, nor Chemnitzia gracilis of de Koninck, fossil species of Odostomia. The columellar fold or tooth is sometimes observable in this species. The following is m y note as to the animal.-"Body clear white, with a narrow dark streak down each side : mantle thick: head or snout (mentum) narrower than the foot and extending beyond it; extremity notched in the middle : tentacles leaf-like and folded, proportionally large : eyes small and black, sessile on the inner side of the tentacles at their base : foot long, squarish or truncated in front, with angular corners, pointed behind. Active and not very shy or timid." 40. ODOSTOMIA ACUTICOSTATA\ Jeffreys. (Plate XXVII. fig. 2.) S H E L L obeliscal or spit-shaped, rather thick, opaque, and glossy : sculpture, several equal-sized, narrow, linear, and oblique longitudinal ribs, about 20 on the last whorl ; they are considerably narrower than their interstices, and do not extend beyond the periphery, where they are intercepted by a thread-like spiral stria; the base and apex are quite smooth: colour white : spire long, turreted, and gradually tapering: whorls 9 (including the nucleus), rather convex, the last occupying about a third of the shell; nucleus regularly spiral and intorted : suture shallow but well defined, nearly straight: mouth small, squarish: outer lip contracted above and curved below : inner Un and pillow thickened : umbilicus and tooth none. L. 0*125. B. 0*05. 'Porcupine' Exp. 1870: Med. St. 45, Rasel Amoush. Two specimens. Distribution. Cape Breton (de Folin), Palermo (Monterosato), Gulf of Gabes on the Tunisian coast (Dautzenburg); 20-103 fms. The ribs are not so close-set or contiguous as in O. lactea aud other species of the same section, and they are much narrower than the interspaces. Not Turbonilla aculicostata of Speyer, a Miocene species, which is a synonym of Auricula costellata of Grateloup. 41. ODOSTOMIA FULGIDULA2, Jeffreys. (Plate XXVII. fig. 3.) S H E L L shaped like a short cylinder, strong for its minute size, nearly transparent, and of a prismatic lustre : sculpture, several straight or linear, and sharp longitudinal ribs, which are narrower than their interstices, and are apparently but not really continuous; there are 15 or 16 on the last whorl, and they do not extend below the 1 Sharply ribbed. 2 Somewhat bright. |