ODOSTOMIA. 127 



of Fleming and Macgillivray, 0. Eulimoides of Hanley, 

 and Turbonilla oscitans of Loven. The variety crassa 

 seems to be Brown's Jaminia pullus. 



9. O. conoi'dea*, Brocchi. 



Turbo conoideus, Brocchi, Conch. Foss. Subap. ii. p. 659, t. xvi. f. 2. 0. 

 conoidea, F. & H. iii. p. 260, pi. xcv. f. 4. 



Body clear bluish- white throughout, with faint streaks of 

 flake-white : snout or mentum grooved lengthwise and cloven 

 at the extremity, so as to form a lobe on each side, divided by 

 a narrow depressed line, and resembling a second pair of ten- 

 tacles : proboscis issuing at the termination of the groove close 

 under the eyes and below the centre of the tentacular veil : 

 tentacles flat, bevelled, not very short (" slightly setose," Clark); 

 tips moderately large, rounded, inflated, and flake-white : eyes 

 very black, situated exactly at the internal bases of the ten- 

 tacles, immersed in the skin, so close to each other that a hair 

 can scarcely be laid between them ("I never saw the eyes 

 so contiguous in any other mollusk," Clark) : foot large, rather 

 long, membranous, gently reflected at the sides on itself (which 

 reflexion it in some measure retains on* the march), deeply 

 arched in front, causing the flanks to be pointed, and gradually 

 tapering behind to a bluntly angular point ; sole slit in the 

 middle in front. (Loven, Clark, and J. G. J.) 



Shell oblong-conical, with a narrow and somewhat pointed 

 base, solid, nearly opaque, of a polished lustre : sculpture, the 

 usual microscopical lines of growth, besides a slight impressed 

 line round the periphery, which is more or less distinctly keeled, 

 especially in young or immature specimens : colour ivory- 

 white : spire tapering to an abrupt extremity ; nucleus con- 

 cealed and twisted inwards : ivhorls 8, nearly flat, and gradually 

 enlarging ; the last constitutes about one-half of the shell : 

 suture narrow and slightly channelled ; it slopes downwards 

 from the peripheral keel on each of the upper whorls : mouth 

 oval, contracted above, somewhat expanded but scarcely an- 

 gular below : its length is about one-third of the whole spire : 

 outer lip gently curved, inflected just below the periphery ; 

 inside deeply grooved in the direction of the spire, like the 

 barrel of a rifle ; the grooves are 8 or 9 in number and ter- 

 minate in small denticles or notches within the mouth ; they 



* Having a conical appearance. 



