582 



Unguli.n'u?. Mytilus unguliuus. Den. Br. Shells, iv, t. 128. f, 2. .?. 



Gmel. Syjl. p. 3354. 12. 

 Cliem. Conch, viii. t. 84. f. 747, 

 III t. 85. f. 756. 



On the authority of Mr. Donovan, this is given as a 

 Britijli fpecies ; who fays, " feveral fliells of this kind 

 "were picked up by Mifs Pocock, on the coaft of 



" CormoalL' 



It very much refembles M. edulis, but is generally al- 

 lowed to be more pointed, and curved at the beak; be- 

 neath which it fwells, or projefts more at the pofterior 

 margin : according to different authors, the hinge feems 

 to be furnifiied with from two to fix teeth at the tip, and 

 "the groove with numerous crenulce : valves very convex, 

 of a greenidi, or blueifh-black colour. Length four or 

 five inches ; breath from two, to two and a half. 



Inhabits New Zealand, Cape of Good Hope, and Medi- 

 terranean. 



Much caution is requifite, in determining the fpecicy 

 of this genus, fo fimilar to each other, and fubjeft to fo 

 much individual variation by climate, and other circum- 

 ilances : which have already, we fear, been the occafion 

 of multiplying the fpecies beyond their natural bounds. 



\ i7L 



Wytilus anatinus. Don. Br, Shells, iv, t. 113, 



PINNA. 



