OF CONCHOLOGY. Ill 



localities where the latter species is common, we find no small 

 ones of the characters of the adult, but those of aculeata, 

 abound. The characters of the species are exaggerated on 

 aculeata. Its spines are longer and larger in size, numbering 

 seven or eight in the upper transverse row, while those on liip- 

 pocastanum are ten or more in number. The former is more 

 distinctly engraved by transverse striae, extending over the 

 spines, on most specimens, as represented by Regenfuss. A 

 variety occurs, of which the whole surface is densely covered 

 with scales. The black lines are not only arranged transversely, 

 but also longitudinally in zigzag or angular shape. 



Plicata, Lam., we consider a variety of hippocastanum. We 

 have no authentic specimen, but the published descriptions, 

 and the figure by Quoy, are well represented by specimens 

 which occur in Polynesia. 



Savignii, Desh., (= ? stellata, Bolt.), inhabiting the Red Sea, 

 is distinct. Judging from specimens we have received from 

 Bourbon, Mauritius and the Andaman Islands, it appears to be 

 allied, through its varieties, with intermedia, Kiener. 



To prevent confusion, the name of M. Deshayes should be 

 attached to aculeata as author ; Regenfuss having applied the 

 same name to P. hystrix, pi. 3, fig. 32, and to aculeata proper 

 on previous plate. 



We attach the name of Lamarck to hippocastanum; for the 

 reason that his description corresponds to that species, although 

 his references are not satisfactory, and from the type figured by 

 Kiener from the Lamarckian collection. 



CUMA MURICINA, Blain. 



1832. Purpura muricina, Blain, Nouv. Ann. du Mus., vol. 1, p. 



218, pi. 10, fig. 2—4. 

 1832. Purpura muricoides, Blain, Nouv. Ann. du Mus., p. 219, 



pi. 10, fig. 5. 

 1832. Purpura turbinoides, Blain, Nouv. Ann. du Mus., p. 217. 



" " tessellata, Sow., Genera of Shells. 



1835. " muricina, Kien., Coq. Viv., p. 33, pi. 6, fig. 13, 



P l. 7, fig. 15. > 

 1835. Purpura turbinoides, Kien., Coq. Viv., p. 118, pl. 35, fig. 



82. 

 1837. Purpura foliacea, Conrad, Jour. Phila. Acad., p. 268, 



pl. 20, fig. 24. 

 1846. Purpura muricina, Rve., Conch. Icon., sp. 59. 



Blainville and Kiener are both in error in their reference to 

 Voy. d'Astrol, for the figure of shell or animal of turbinoides. 



The animal of thiarella, figured by Quoy, is quite distinct 

 from that of muricina and turbinoides. 



