202 KELLIID^E. 



Mr. M 'Andrew's collection, dredged by him off Orotava 

 and Lancerote in the Canary Isles. 



This is certainly not the young of any other shell, as 

 might be hastily imagined on account of its minute size. 

 I have a series of all ages from the fry to the adult. 

 Nor does it resemble any other British shell. In some 

 respects it is even abnormal as a Lepton. The regular 

 concentric ribs and the inclination of the beaks to one 

 side do not occur in any of the above-described species. 

 The dentition, too, is peculiar. The cardinal tooth in 

 the left valve is united by a ledge with the lateral tooth 

 on the longer and broader side of the shell, so as to make 

 both appear in one point of view like the same tooth. 

 The cardinal tooth in the other valve is not discernible 

 unless in fresh specimens, and by means of a Coddington 

 lens or an equally strong microscopical power. Even 

 this pigmy shell, barely exceeding half a line in length, 

 is sometimes found to have been drilled by one of the 

 smaller Muricidce. 



\J . v - 



4. L. CLAR'KI*: *, Clark, 



L. Clarkics, Clark, in Ann. Nat. Hist. 2nd ser. March 1852 ; F. & H. iv. 

 p. 255, pi. cxxxii. f. 7. 



SHELL triangularly oval, with an oblique outline, much com- 

 pressed, not very thin, semitransparent and rather glossy: 

 sculpture, slight and numerous but irregular concentric striae, 

 which are stronger and more crowded in front and at the sides, 

 and usually a few snow-white lines or streaks, radiating from 

 the beak towards the margins and more or less interrupted ; 

 the surface is also slightly scabrous or rough in fresh speci- 

 mens : colour yellowish-white : epidermis extremely thin : 

 margins abruptly truncate but rounded at the smaller end, 

 with an oblique slope to the ventral margin, which is likewise 

 rounded, very broad, and wedge-like at the larger end, and 

 forms a blunt angle behind : beaks small, projecting beyond 



* Named out of compliment to Mrs. Clark, the wife of the distin- 

 guished British conchologist. 



