13 



SYNONYM A. 



Pecten ornatus. Lam. An. sans Vert. vol. 6, 

 parti, p. 17^. 



OSTREA PELLUCENS. Gmel. 



Pecten. Enc. Method.pl. 214;, fig. 5. 

 Lister, tab. 175. 



Cabinet of the Acad. Nat. Sciences, No. 116G. 



Hi 



OBSERVATIONS. 



This shell is generally of a pale yellow or ochra- 

 ceoiis colour, with red angular spots, although La- 

 marck describes it as "red, with fuscous zones.'' 

 Young shells have the ribs nearly smooth and seldom 

 alternating in size. 



Common on the coasts of East Florida and the 

 West Indian Islands. 



Lamarck observes that this is the Ostrea pelluccns 

 of Gmelin, but not of Linneus, who refers to Argent- 

 ville, table 24, fig. H, for his pellucens, which Dill- 

 wyn believes to be O. varia. In the present uncer- 

 tainty, therefore, with regard to the species intended 

 by Linneus, I have adopted Lamarck's specific name 

 as least likely to increase the confusion which exists 

 in the nomenclature of this species. Dillwyn, in his 

 Index to Lister's Conchology, observes that the Os- 

 trea crenulata and 0. innominata of Gmelin are 

 both varieties of his pellucens, and have been consti- 

 ted from the two figures in Lister, table 175, one of 

 which is quoted by Lamarck for the present species. 



B 



