101 



generally white, thicker, and being always fomewhat wrin- 

 kled ; in the aperture being more contra6i:ed, the pillar 

 lip thickened, and never more than two plications, nor any 

 teeth on the outer lip. Bui the colour and fubftance of the 

 fhell, and its being more ventricofe in the body in proportion 

 to its length, are evident dillin6tions at firfl; fight, as may be 

 feen by a comparifon of the figures. 



The animal is a white Lhnax with two reniarkably fliort 

 angular tentacula ufually margined with black, and two black 

 eyes at their bafe behind : fujlenlaculum extending before 

 the head, bifid. Locomotion extremely confined. 



Shell pellucid, Mhite and fmooth, tapering to an obtufe Hvalina. 

 point, with fix, flat volutions fcarcely defined by the fepa- Tab. 29. f. 5. 

 rating line : the body whirl is more than half the length of 

 the Iliell : the aperture contra6led, the bafe truncated, and 

 canaliculated ; outer lip fmooth; columella plicated with 

 feven or eight fine thread like llria' that originate from be- 

 hind the pillar lip. Length a quarter of an inch ; breadth 

 more than one third its leng;th. 



This new and elegant fpecies in the cabinet of Mr. Las- 

 key, was found by him on the Shell Bank, near Dunbar. 



A very minute fpecies, which appears fo nearly allied to Alba. 

 the fhell originally fent to us by Mr. Boys for No. 6i, of p. 23i. 



Walker, 



