_Burnt, or Purple-mouthed Strombus_--(_Upper figure_.) * * * * * GENERIC CHARACTER.--See Pl. 10. * * * * * SPECIFIC CHARACTER. _S. testa nodosa; labio interiore albo, laevi; labii exterioris inflexi, supra sinuati, intus purpureo-atri, striati; lobo basali edentulo._ Shell nodulous; inner lip smooth, whitish; outer lip inflected, above sinuated, within striated, blackish purple; basal lobe not toothed. _Young._ S. papilio. _Chem._ x. _t._ 158. _f._ 1510, 11. _Dillw._ 661. 120. 11. _Adult._ Strombus exustus. _Humphreys in Mus. Cal._ _p._ 38. _n._ 714. S. lentiginosus. _Martini_, iii. _t._ 80. _f._ 825, 826. _Gmelin._ 3510. (_var._ [beta].) _Dillwyn._ 660. _Seba_, _t._ 52. _f._ 17. 18. _Knorr._ 3. _t._ 26. _f._ 2. 3? * * * * * Specimens now before me prove that the _S. papilio_ of Chemnitz is a young shell of _S. exustus_, a species named by Mr. Humphreys in the Calonne Catalogue, and described in his own manuscripts. In a young state, the aperture is smooth and nearly white, but when full grown, the outer lip is strongly striated, and the aperture reddish purple, dark red, or reddish chesnut: the outer lip is but slightly sinuated above, and the basal lobe never toothed, as in the next species. Inhabits the island of Haynam, in the East Indies, and is very rare. Described by Lamarck (_Syst._ 7. _p._ 211) under the name of _S. Papilio_. The first of these names, however, has the right of priority. (See _Mus. Cal._ 1797.) The figures of Martini, tom. 3. tab. 8. f. 825, 826, clearly represent this species; although Lamarck has quoted them for _S. lentiginosus_. * * * * * STROMBUS lentiginosus, _Tuberculated Strombus_ * * * * * _S. testa nodosa; labii exterioris supra rotundati ad spiram annexi, profunde bilobati, margine crasso inflexo, sub-nodoso; lobo basali dentato; apertura laevi._ Shell nodulous, outer lip above rounded, attached to the spire, deeply bilobated, margin thick, inflexed, slightly nodulous; basal lobe toothed; aperture smooth. _Young._ _Seba_, _t._ 62. _f._ 37. 40. _optime_. _Martini_, 3. _t._ 89. _f._ 871. _t._ 91. _f._ 891. 892? _Lister_, 893. 12? _Adult._ S. lentiginosus. _Gmelin_, 3510. _Dillwyn._ 660. _Martini_, 3. _t._ 81. _f._ 827, 828. _Seba_, 62. _f._ 11. 30. (_optime_.) _Lister_, 861. 18. _Gualt._ 32. _f._ A. _Lam. Syst._ 7. _p._ 203. _Knorr_, 3. _tab._ 13, _f._ 2. Lamarck has omitted to quote any of the figures representing the young shells of this and the following species. * * * * *