484 Cypraa reticulata and Cypraa Jiisti io distinct. , 



confined to the tropical regions of the Pacific Ocean. Great num- 

 bers of them are brought from the Polynesian Islands, by Ameri- 

 can whaling vessels. Martyn's specimens were from the Friendly 

 Islands. 



Cypr.ea histrio. McuscJien. PI. XVI. Fig. 2. 

 C. testa ovativ, ad cxtremitates subattenuatfi, super conVexA,. 

 interdum turgida, castanea, occllis albidis rotilndatis aul polygo? 

 nis; macule nigra juxta spiraffl : linea dorsali recta, propriore la- 

 terem sinistrum; lateribue albido-fulvis, nigro sparsim maculatis; 

 basi subconvexa, albido-fulva, aut violascente ; rima, subrccta, den-- 

 tibus castaneis, extus non productis. 



SYNONOMY* 



Lister, 1 688. Hist. Conch., t. C59, fi 3 1 , a. 

 Knorr, 17GG. Vcrgnugen, 2, t. 16, f. 1. 

 Cypraa hislrio. Meusclicn, 1787. Museum Geversianum, p. 40-1. 

 6. arlequina. Chemnitz, 1788. Conch. Cab. 10, p. 110, tab. 145, f. 



1346, 1317. 

 C. histrio, pars. Gmelin, 1789. 13th ed. of Systema Saturn), p. 3 103. 

 G. histrio. lirug., 1816. Enc. Mfetbodique, pi. 351, f. 1, a. b. 

 C. hislrio, pars. Dillwyn, 1817. Descriptivo Catalogue, Vol. I., p. 439,. 



No. 4. 

 C. hislrio. Lamarck, 1822. Animaux sans Vcrtcbrcs, Vol. VII, p. 379. 

 C. arabica, var. histrio, pars. Gray, 1824. Monog. in Zoological Jour-- 



nal, Vol. I., p. 77. 

 ? C. arabica, var. depressa do. do. do. 



Vol. I., p. 77. 

 ? C. histrio. Quoy & Gaimard, 1833. Voyage do PAstrolabe, t. 3, p. 



30, pi. 47, f. 10, 11, with animal. 

 C. arabica, var. Kioner, 1843. Iconogruphio des Comiillcs Vivantes,- 



Genus Cypraa, p. 106, pi. 17, f. 2. 



• The figures of Bonanni, Iiumphius, rcliver, and Wood, arc so ambiguous, that 

 I have deemed it best to omit all reference to them. The figure in tho Voyago of 

 the Astrolabe, I also quoto with somo doubt, since it represents tho shell nearly 

 covered by the folds of tho mantle. Tho small portion of the back of tho shell 

 which is visible, is not sufficient to enable mo to refer it with certainty to tho 

 histrio. In this connection, I am happy to acknowledge my obligations to Dr. 

 John C. Jay, of Rye, for the means which his extensive conchological library hae 

 afforded, of verifying the most of the sy nouomy given in this paper. 



