1884.] 'lightning' AND 'porcupine' EXPEDITIONS. 359 



U 39. Odostomia delicata, Monterosato. 



Chemnitzia gracilis, Phil. Moll. Sic. ii. p. 137, t. xxiv. f. 11. 



O. delicata, Monter. J. de Conch. 1874, p. 2f)7. 



' Porcupine • Exp. 1869 : St. 18, Donegal B. 1870 : Atl. 17 



Distribution. Bundoran, Co. Donegal, with Circulus stri'atus 

 {J G. J.), Loire-Iaferieure {Cailliaud), Gulf of Gascony {de Folin), 

 Mediterranean from Spezia to Alexandria, and Adriatic; 18-120 fms 



Not Turbo gracilis of Brocchi, nor Chemnitzia cjracilis 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.— "^oo'y clear 

 white, with a narrow dark streak down each side : mantle thick : 

 head or snout (mentum) narrower than the foot and extendin-^ 

 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." 



t/ 40. Odostomia acuticostata \ Jeffreys. (Plate XXVII. fig. 2.) 

 Shell obeHscal or spit-shaped, rather thick, opaque, and glossy • 

 sculpture, several equal-sized, narrow, Hnear, and oblique lono-itudinal 

 ribs, about 20 on the last whorl ; thev 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 : ivhorls 9 (including the nucleus), rather convex 

 the last occupying about a third of the shell ; nucleus reo-ularlr 

 spiral and intorted : 5?</Mre shallow but well defined, nearly strmo-fat • 

 mouth small, squarish : outer lip contracted above and curved befow ' 

 inner lip and pillow thickened : umbilicus and tooth none L 0- 1 2'i 

 B. 0-05, ■ 



'Porcupine' Exp. 1870: Med. St. 4.5, Rasel Amoush. Two 

 specimens. 



Distribution. Cape Breton {de Folin), Palermo {Monterosato) 

 Gulf ot Gabes on the Tunisian coast {Dautzenburg) ; 20-103 fms. 



The ribs are not so close-set or contiguous as in 0. 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^ Jeffreys. (Plate XXVII. fig. 3.) 

 Shell shaped hke 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 la or IG on the last whorl, and they do not extend below the 

 ' Sharply ribbed. 2 Somewhat briglit. 



