238 MYTILUS. MUSSEL. Class VI. 



6. UNGOLA- Gm. Lin. 3354. Lin. 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 Cornish coast. 



7. umbili- Lin. Tr. viii. 10g. Mont. Test. Br. 164. id. Sup. 71. f 



CATUS. 



umhilicated. 



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 Priest holme island, Angle- 

 sey. Discovered by the reverend Hugh Davies. 

 The pea-crab found in this species of a larger 

 size than usual. Tab. lxviii. 



modiolus. Lin. Syst. 1158. No. 256. Lin. Tr. viii. 107. 



great. Gm _ £irc. 3354 . Mont. Test. Br. 163. id. Sup. 



List. Conch, tab. 356. Jg. 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 lusus of M. Modio- 

 lus. Ed. 



