CONCHYLlX—DITHYIiA. 43. J 97 



Mytilus testa ovatd crassd opacd tumidd, antice incur vatd, ""curvatus. 



nmbonibus dicaricatis suhbidentatis. 

 Shell oval thick opake and tumid, incurved on the anterior side, 



the beaks divaricate with two or three teeth. 

 Mytilus incurvatus. Pennant, iv. p. 237, tab. 67, fig. 1. 



Montagu, Test. Brit. p. 160. 



Linn. Trans, viii. p. 106, tab. 3, tig. 7. 



Turton, Linn. Syst. iv. p. 192. 



Turton, British Fauna, p. 163. 



Turton, Conch. Diet p> 109. 

 Mytilus edulis. Var. Dillwyn, Descript. Catal. p. 309 

 Musculus parvus. Lister, Conch, tab. 362, fig 201, 202. 

 Mus. nost. Western coasts and Ireland. 



Shell hardly an inch and a half long, strong, tumid, much 

 curved, of a blueish-grey color, with the beaks separated, and 

 two or three teeth only under them. 



Mytilus testa ovatd diaphand crsruled radiatd, antice rectd, peilucidus. 



umbonibiis conniventibus suhbidentatis. 

 Shell oral transparent blue and radiate, straight on the anterior 

 side, the beaks close together with two or three teeth. 



Tab. nost. 15, fig. 1 and 2. 

 Mytilus pellucidus. Pennant, iv. p. 237, tab. 66, fig. 3. 



Turton, Linn. Syst. iv. p. 292. 



Montagu, Test. Brit. p. 160. 



Donovan, British Shells, iii. tab. 8J. 



Linn. Trans, viii. p. 107. 



Turton, British Fauna, p. 163. 



