PURPUEA.— Plate X. 



Species 50. (Mus. Cuming.) 



Purpura septentrionalis. Purp. testa, mbfusiformi- 

 ovatd, crania, ponderosd ; basi subcanalicidatd et re- 

 curvd; anfractibws lisvibus, transversim obsolete liratis; 

 aperturd parvd, labro intus obscure denticulato ; cas- 

 taneo-fttscd, intus albd. 



The northern Purpura. Shell somewhat fusiformly 

 ovate, thick, ponderous, slightly chamielled and re- 

 curved at the base ; whorls smooth, transversely 

 obsoletely ridged ; aperture small, lip obscm-ely den- 

 ticulated within ; chesnut brown, interior white. 



Hab. Sitka, north-west coast of America 



A solid ponderous shell, attenuately produced at the 



base. 



Species 51. (Mus. Cuming.) 



Purpura Preycinetii. Purp. testa ovatd, tenui, infiatd, 

 basem versus attenuatd, spird brevmimd, acuta; an- 



fractibiis obscure subtiliter multkarinatis ; columella 

 excavatd, angimtd, inferne pemdiariter compressd ; 

 aperturd ampld ; pallide fused, obscure fasciatd, aper- 

 tures fauce labroque albicantibus. 

 Freycinet's Purpura. Shell ovate, tliin, inflated, atte- 

 nuated towai-ds the base, spire very short, sharp ; 

 whorls obscurely finely many-keeled ; columella exca- 

 vated, narrow, peculiarly compressed at the lower 

 part ; aperture large, pale brown, obscurely banded, 

 lip and interior of the aperture whitish. 

 Deshayes, Revue Zool. Soc. Cuv., 1839. Magasin de Zool. 



1841, MoU.Pl. 26. 

 Hab. Kamtschatka. 



M. Deshayes describes this species as approximating to 

 the Purpura Rudolpki, I fear however that this observation 

 has rather a tendency to mislead ; it is much more closely 

 allied to the Purpura haustrum, having the same light 

 attenuated form, although sufficiently remote in general 

 character. 



