ODOSTOMTA. 127 



of Fleming and Macgillivray, 0. Eulimoides of Hanley, 

 and TurbonUla oscitans of Loven. The variety crassa 

 seems to be Brown's Jaminia pullus. 



9. O. 



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 

 veiy 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) : foothirge, 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 : wJiorls 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- 

 gidar 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. 



