, PURPURA. 257 



PTJPILLA. Sw. A sub-genus of Pupa, P. marginata, Auct. 

 (Gray's Turton, p. 196.) 



PUPINA. Vignard. Moulinsia, Grateloup. Fam. Colimacea, 

 Lam. — Bescr. Pupiform, sub-cylindrical ; last wborl less than 

 the preceding ; surface brilliantly polisbed ; suture of the spire 

 enamelled ; aperture circular ; peritreme thickened ; a notch at 

 the base of the inner lip ; operculum horny, spiral.- — Obs. The 

 species upon which this genus was originally founded, and 

 described in the " Annals des Sciences Naturelles," tome 18, 

 p. 439, (December, 1829,) is a small pupiform shell, having 

 nothing to distinguish it but the enamelled suture and the notch 

 in the aperture : characters quite insufficient in themselves for 

 the purpose of generic distinction ; at the same time sufficient 

 to lead M. de Ferussac to the suspicion of its having an oper- 

 culum. The next species, described by Grateloup under the 

 name of Moulinsia Nunezii, (Ann. Soc, Linn. Burd, Nov. 1840), 

 presents more remarkable characters, having the spire tinned 

 backwards and the penultimate whorl disproportionately large. 

 Seven additional species have been lately brought to this country 

 from the Philippine Islands by Mr. Gumming. They are 

 described by the author in the Zoological Proceedings for 1841, 

 and an illustrated monograph of the whole genus is published 

 in the Thesatirus Conchyliorum, Part I, by the Author. The 

 genus is divided into the genera " Gallia," Gray, '^ Registoma,^^ 

 Hassell, and " Pupina." It may be observed that in one of 

 the new species, the notch ia the peritreme almost disappears, 

 leaving a very slight siuus. PL xxv. fig. 524, 526, 527, 528. 



.PTJEPUEA. Auct. {^^ The shell-fish from which purple is taJcen,^'' 

 Plin.) Fam. Purpurifera, Lam. Entomostomata, Bl, — Bescr. 

 Oval or oblong, thick ; spire for the most part short, sometimes 

 rather longer ; external surface generally sulcated, granulated, 

 tuberculated or muricated; aperture long, oval, somewhat 

 dilated, emarginated anteriorly ; outer lip crenated, acute ; co- 

 lumella flattened ; operculum horny, vnth the nucleus lateral, 

 thin towards the columella. — 06s. True Purpurae are to be 

 found in the Lamarckian genera Buccinum, Eicinula, and others. 



