238 MYTILUS. MUSSEL. Class VI. 



6. UNGULA- Gm. Lin. 3354. Lm. Tr. viii. 107. 



TUS. 



* M. with a smooth curvated shell, the posterior 

 margin inflected; hinge at the extremity fur- 

 nished with two teeth. 



Found on the Coiiiish coast. 



7. uMBiLi- Lin. Tr. viii. lOg. Mont. Test. Br. l64, id. Sup. 71.f 



CATUS. 



nmhiiicated. 



M. with a strong shell, and the space opposite 

 to the hinge deeply inflected or umbilicated; 

 the form nearly oval. The length sometimes 

 five inches. A rare species, and new. Some- 

 times dredged up off Priestholme island, Angle- 

 sey. Discovered by the reverend Hugh Davies. 

 The pea-crab found in this species of a larger 

 size than usual. Tab. Ixviii. 



8. MODIOLUS. Lin. Syst. 1158. No. 256. Lin. Tr. viii. 107. 



g''^«^- Gm. Lin. 3354. Mont. Test. Br. l63. id. Sup, 



List. Conch, tab. 356. Jig. 65. 



195. 



M. with a strong shell, with a blunted upper 

 end ; one side angulated near the middle ; from 



t Supposed by Mr. Montagu to be only a liisus of M. Modio' 

 Ins, Ed, 



