This new fpecies Was difcovered by Mr. Laskey, as a 

 Srol^/h produ6tion, having taken feveral by dredging in the 

 Frith of Forth, To tdis gentleman the pubhc in general, and 

 ourfelves in particular, are much indebted for many non- 

 defcripts in the field of Teftaceology, and for the light he 

 has enabled us to throw on other doubtful Britijh fpecies of 

 fliells. 



CARDIUM. 



Mactra radiata Don. Br. Shells, v. t. l6l —■Lin. Trans, viii. p. 69. Edentuia, 



Shell lub-ovate, thin, rounded at one end, and fub-angu- 

 lated at the other ; a few broad, dirtant, flight elevations 

 concentrically mark the fliell ; befides which it is wrought 

 with numerous fine obfolete longitudinal y?/?^ : the umbo is 

 pointed, and turns a little to one fide : colour cinereous, paler 

 beneath the epidermis, with a tinge of flefh-colour. Infide 

 fmooth, white, the Jiria equally vifible as on the outfide in 

 the thin part of the fliell ; margin plain. It is deftitute of 

 any primary tooth, but immediately under the beak is a fmall 

 deprefillon, with the rudiment of a minute oblique denticle, 

 and a little remote on each fide is a fmall lamina. Length 

 two inches and a half: breadth three inches. 



This appears to be an extremely rare fpecies on our coafi, 

 having only been difcovered by Mr. Laskey on the fliore 

 near Portfmouth, after a iiorm, and who favoured us with a 



fpecimen 



