OF CONCHOLOGY. 109 



Nassaria farinosa, Gld. 



1852. Buccinum farinosum, Gld., Am. Ex. Ex., p. 255, fig. 313. 

 I860. Hindsia angicostata, Pse., P. Z. S. London, p. 142. 



Purpura aperta, Blain. 



1832. Nouv. Ann. du Museum, p. 210. 



1837. Purpura macrostoma, Conr., Jour. Phil. Acad., p. 267. 

 1846. " Jiulca, Val., Voy. Venus, pi. 8, fig. 2. 



1852. " aperta, Eyd. and Soul., Voy. Bonite, pi. 39, fig. 



8—10. 



This species is peculiar to the Hawaiian Islands. 

 The animal as figured in Voy. Bonite is not correct in shape 

 or color, nor the color of the shell. 



Purpura iiarpa, Conrad. 



1837. Jour. Phila. Acad., vol. 7, p. 266, pi. 20, fig. 25. 

 1846. Purpura scobina, Rve. non Quoy., Conch. Icon., sp. 72. 

 1852. " harpa, Eyd. and Soul., Voy. Bonite, pi. 39, fig. 

 14—16. 



This species does not vary, as Mr. Reeve states, and is widely 

 distinct from P. scobina, Quoy. It has not been found at any 

 locality but the Hawaiian Islands. 



Purpura armigera, Chem. 



1795. Buccinum armigerum, Chem., Conch. Cab., vol. 11, pi. 



187, fig. 1798-99. 

 1846. Purpura armigera, Rve., Conch. Icon., sp. 27. 

 " " affinis, Rve., " " sp. 77. 



Having received a number of specimens of the affinis from 

 the Paumotus, I do not hesitate to adopt the above synonym. 



I have but lately discovered that many of the marine Graster- 

 opodoa at the Paumotus vary much more widely from the type 

 of the same species inhabiting Tahiti (but 200 or 300 miles 

 distant) than they do from Tahiti, through Polynesia, to the 

 East Indies and Red Sea. The variation chiefly consists in 

 being dwarfed, although, in some cases, other characters of the 

 shell vary. I shall refer to this curious fact more fully here- 

 after. 



Purpura hippocastanum, Lam. 



1822. An. sans Vert. vol. 7, p. 238. 



1832. Purpura hippocastanum, Quoy., Voy. d'Astrol. vol. 2, p. 

 557, pi. 38, fig. 1—6. 



