CONCHYLI A— i)rr/fYi2 J. 47. 217 



47. LIMA— BRUGUIEEE. 



Testa longitudinaliter oblonga, (equivalvis, incequilateralis, basi trans- 

 versim auriculatd, umbonibiis remotiusculis. Cardo edentulus, fovea 

 externa et disseplmento transversa sub umbones Ligamentum exter- 

 num. 



Shell longitudinally oblong, equivalve, inequilateral, with the auricles, 

 at the base, and the beaks rather remote. Hinge without teeth, 

 with an external cavity and a transverse dissepiment under the 

 beaks. Ligament external. 



The character of this genus sufficiently distinguishes it both from 

 the Ostrea and the Pecten. From the first it differs in being fur- 

 nished with small auricles at the sides of the hinge; from the latter 

 in having the beaks distant, between which the ligament is placed 

 externally, as in the Pectunculus, and separated from the interior of 

 the valve by a strong transverse parietal dissepiment, and from both 

 in its general outline, which is longitudinally oblong, with one of 

 the sides nearly straight, and the ojiposite one produced in an arcu- 

 ated manner, not unlike the common Mussel. 



All of them are thin, transparent, white colorless and without 

 gloss, generally free, but occasionally fixed to the Flustra and the 

 Alcyonium. 



Lima testa tumidd, striis numerosis longitudinalibus subundatis minor- bullatu 



ibusque interpositis, auriculis obliquis. 

 Shell tumid, with numerous longitudinal somewhat undulate striae 



and lesser ones between them, and the auricles oblique. 



2f 



1. 



