200 CO^ CRY Uii—BITHYR A. 44. 



Var. c. diinidiatimfoUaceo-barhata, foUolis integerrimis. 



half clothed with foliations which are entire on both the 

 edges. 

 Mytilus barbatus. hinn. Syst. Nat. p. 1156. 



Chemnitx, viii. p. 168, tab. 84, fig. 749. 

 Pennant, iv. p. 238, tab. 67, fig. 2. 

 Donovan, British Shells, ii. tab. 70. 

 Mus. nost. The various seas of the British coasts. 



Shell when full grown four or five inches long, thick, coarse, 

 covered with a blackish skin which is frequently clothed with 

 some scattered glossy hairs, and has a tendency to curve inwards 

 near the beaks opposite the hinge; and when about half grown 

 is thinner, of a horn-color, and frequently clothed more or less 

 with long leaf-like filaments, which uniformly differ from those 

 which cover the Modiola Gibsii, in liaving no serratures down 

 the edges: the very young are usually marbled or radiate. 



o 



Gibsii. MoDioLA testii subti'igond, transversim striata, foliaceo-barhatu 

 foliolis hinc serratis. 

 Shell somewhat triangular, striate transversely, clothed with 



foliations which are serrated on one edge. 

 Modiola Gibsii. Leach, Miscell. ii. p. 34, tab. 72, fig. 2. 

 Mns. nost. On the western coasts. 



Shell about two inches long, and one and a half broad, very 

 flat and angular at the anterior side, regularly striate transversely, 

 white and opake under the skin, covered more or less with long 

 foliations which are constantly notched down one of the sides. 



