28 



one, that might eafily be pafled unnoticed. Length half an 

 inch ; breadth ruther more. The umbo in the only f|)ecinien 

 we have examined is ferruginous, but this might have been 

 llained. 



Chemnitz obferves this is ftridlly neither a Mya, nor a 

 Tellina, but it was thought moft allied to the latter. 



The fpecimen from wliich the above defcription is taken 

 was dredged up by Mr, Laskey, off Cramond ifland, in tlie 

 FrUh of Forth. 



Laskeyi. Sliell ovate-oblong, fmooth, and of a purplifli-white colour, 

 ab. 28. f. 3. darker towards the umbo, but when recent, covered with an 

 olivaceous-yellow epidermis : the umbo not quite central, but 

 obtufe: the fides dilTimilar, one being rounded, the other 

 obtLifely pointed, in the form of Donax truncidus, and which 

 it very much refembles in coniour, but has not the thickened 

 margin like that fliell. The infide is white round the margin, 

 and dellitute of creinila; the centre is clouded moreorlefs 

 with purple: in one valve there are two approximate, fub- 

 bifid teeth, and the margin clianneled from the teeth almoft 

 to the end of the longed fide ; and on the other fi ie of the 

 teeth the margin is replicated, or folded bark to the con- 

 necting cartilage, to which it is affixed : the other valve has 

 only a fingle tooth, which locks in between the two of the 

 cppofite, and which arc reciproc^;lly received into a cavity on 

 each fide the tooth in this valve, and the mar?]cin is dellitute of 

 any channel. Length half an inch ; breadth three quarters. 



This 



