KELLIA. 89 



(interrupting the hinge margin, and causing, when removed, 

 an apparent cavity in it) ; behind it, in either valve, stands 

 a subtrigonal, and rather remote, lateral lamina. In the 

 right valve, the short but rather broad anterior hinge-mar- 

 gin, which is subvertically truncated just beneath the 

 beaks, is furnished with a single erect somewhat re- 

 curved primary tooth, immediately under the apex of the 

 shell : this tooth leans a little forward, and, as well as its 

 opposing ones, is not bifid. In the left valve are two ad- 

 jacent primary teeth ; the more central, having either a per- 

 pendicular or posterior inclination, is separated by a slight 

 triangular incision of the hinge-margin from the anterior 

 one, which latter (usually the less elevated, often appearing 

 a simple upcurving of the notched hinge-margin) leans 

 slightly forward.* 



* From the small size and extreme fragility of the teeth, and the liability of 

 portions of the cartilage to be mistaken for them, it is not impossible that the 

 Tellimya lactea and tenuis of Brown, are only individuals of this variable species. 

 At least such appears to be the general opinion of conchologists, none of whom 

 have been fortunate enough to procure examples agreeing with the descriptions, 

 which, upon close scrutiny, have not proved to be individuals of the A', suhorhi- 

 cularis. 



Tellhwja lactea, Brown, 111. Conch. G. B. p. 106, pi. 42, f. 10, 11. 



" Nearly orbicular, inflated, thin, pellucid, and glossy white ; one valve with 

 two teeth locking into a triangular void in the opposite valve, with transverse 

 laminre on each side ; left valve with a single recurved cardinal tooth, and a cen- 

 tral triangular laminated tooth, and one remote lateral tooth only. About a 

 quarter of an inch in diameter. Found on the Devonshire coast by Dr. Leach." 



Captain Brown, who still retains his original impression of its distinctness, 

 informs us that his drawing was taken in 1819, at the British Museum, from a 

 specimen in Dr. Leach's collection. 



Tellimya tenuis. Brown, 111. Conch. G. B. p. 106, pi. 42, f. 12, 13. 

 " Orbicular, smooth, glossy, snow-white, with fine irregiilar concentric striae, 

 much inflated ; umbones rather produced, and much turned to one side ; left 

 valve destitute of cardinal teeth, and provided with two large lateral teeth ; right 

 valve with two incurved cardinal teeth and a lateral one ; inside white, and when 

 viewed through a strong lens, has a shagreen-like appearance. Diameter three- 

 eighths of an inch. Found at Newbigging, Northumberland, by W. C. Trevelyan, 

 Esq., and is in his cabinet at Wallington." 



VOL. II. N 



