CONCHYLIA— DiTijyi?^. 38. 165 



Dorset Catal. p. 35, tab. 1, fig. 14. 



Dillwt/n,Descr\pt. Catal. p. 191. 

 Turton, Conch. Diet. p. 240. 



Chemnitz, vii. p. 6, tab. 37, tig. 390, 391. 

 Pectunculus magnus. JLister, Conch, tab. 337, fig. 174. 

 Mus. nost. From Guernsea. 



Shell nearly an inch in diameter, flattish and rounded in the 

 outline, strongly decussate, yellowish-white, with generally a 

 crimson or purple tinge about the margin near the beaks which 

 are small and pointed : inside smooth, glossy white. 



38. P^EiCk—LlNNE. 



Testa transversa, suhfequivalvis, incequilateralis ; umbonibus 

 remoiis, ared transversa intermedia. Cardo rectilinearis, 

 dentibus numerosis obtusis alternatim insertis, exterioribns 

 major ibus : lateralibus nullis. Ligamentum externum. 



Shell transverse, mostly equivalve, inequilateral, with the beaks 

 remote and separated by a transverse area. Hinge in a 

 straight line, with numerous obtuse teeth alternately closing 

 together, gradually enlarging from the centre : lateral teeth 

 none. Ligament external. 



