1884.] * lightning' and 'porcupine' EXPEDITIONS. 359 



i 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 Oirculus 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 Brocchi, nor Chemnitzia gracilis of de 

 Koninck, fossil species of Odostomia. 



The columellar fold or tooth is sometimes observable in this 

 species. The following is my 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." 



1/ 40. Odostomia acuticostata l , Jeffreys. (Plate XXVII. fig. 2.) 



Shell 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 thev 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 lio 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 and 

 other species of the same section, and they are much narrower than 

 the interspaces. 



Not Turbonilla acuticostata of Speyer, a Miocene species, which 

 is a synonym of Auricula costellata of Grateloup. 



41. Odostomia fulgidula 2 , Jeffreys. (Plate XXVII. fig. 3.) 



Shell 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. 



