10 



lantic. D'Avila, therefore, when he asserted that it 

 inhabits America, must have had the present species 

 in view. 



It inhabits the coast from Massachussetts to South 

 Carolina, inclusive. 



PECTEN PURPURATUS. 



Tab. 11,/^. 1. 



specific character. 



Shell suborbicular j ribs about 22, elevated, with 

 transverse undulated purplish lines; interstices stria- 

 ted transversely ; ears nearly equal. 



SYNONYMES. 



Pecten puepuratus. Lam. An. sans vert. vol. 6. 

 part 1, p. 165. 



Pecten dislocatus. Say, Journ. Acad. JVat. Sci- 

 ences, vol. 2, p. 259, 



Cabinet of the Acad. Nat. Sciences, No. 1174. 



OBSERVATIONS. 



This shell is often elegantly variegated with black, 

 white and purple. The internal zone noticed by 

 Lamarck is frequently wanting, and the inner surface 

 varies from purplish brown- to white, without zone or 

 spots. The ribs, in large and perfect specimens, are 

 generally serrated at the sides. 



