10 DltYMxKUS, WEST INDIES. 



D. IMMACULATUS (C. B. Ad., Reeve). PI. 13, figs. 8G, 87, 88. 



Shell perforate or nearly closed, oblong-conic, solid ; opaque white ? 

 suffused with pink below, and sometimes brownish around the colu- 

 mella ; but some shells have a delicate canary-yellow tint instead of 

 pink. Surface somewhat glossy, showing growth-lines and fine spiral 

 striation under the lens. Spire straightly conic, .the apex slightly 

 obtuse, 1-f earlier whorls with typical Drym&us sculpture. Whorls 

 6^ to 7, but slightly convex, the last tapering below. 



Aperture slightly oblique, irregularly ovate; peristome simple, 

 hardly expanded below ; columella with slightly oblique, straight 

 edge, or (in quite old specimens) strongly projecting in the middle, 

 the reflexed margin becoming very heavily calloused with age. 



Alt. 28, diam. 18, length of aperture 12^ mill. 



Alt. 32^, diam. 13J, length of aperture 15 mill. 



Alt: 26, diam. 13, length of aperture 13 mill. 



Alt. 25, diam. 11, length of aperture 11^ mill. 



Jamaica at Mandeville (Gloyne), Port Maria (Rush, Henderson), 

 Long Mt. (Henderson and Simpson). 



Bulimus immaculatus C. B: Adams MS. in Cuming collection, 

 REEVE, Conch. Icon.- pi: 85, f. 631 (Feb., 1850). PFR., Monogr. 

 iii, p. 4-11. GLOYNE, Journ. de Gonchyl. xx, 1872, p. 32.-BuIi>n- 

 ulus immaculatus \V. G. BINNEY, Bull. Mus. (Jomp. Zool. v. p. 338, 

 pi. 1, f. D (jaw and dentition). HENDERSON, Nautilus viii, p. 19. 

 Thaumastm immaculatus Ad., W. G. BINNEY, Ann..N. Y. Acad. 

 Sci. iii, p. 122, ph 12, f. H^(radula). 



Fresh specimens are somewhat roseate throughout, though only on 

 the last whorl is the tint pronounced. Old cabinet specimens fade 

 .to white. In D. liliaceus the columella has more of a spiral twist, 

 and so far as I know the shell is never pink tinted. The two species 

 are very closely allied. The uniform white form of D. bahamensis is 

 also excessively like some specimens of immaculatus. The dentition 

 is like that of D. bahamensis. 



D. LILIACEUS (Ferussac). PI. 13, figs. 90, 91, 92. 



Shell perforate, oblong-conic, with long spire, solid; rather glossy 

 and cretaceous ; opaque white more or less stained with bluish or with 

 a narrow bluish streak or two. Growth-stria? fine, the lens revealing 

 minute spiral incised lines. Spire with nearly straight lateral out- 

 lines, the apex somewhat obtuse, with typical Drymceus sculpture. 



