ANOMA. 39 



Manchioneal and the east end of Portland (Chitty) ; Egg 

 Hill, Portland (Jarvis). 



C. maugeri var. quadricolor CHITTY,, Contrib. p. 10 (1853). 

 C. blandiana BLAND, Ann. Lye. Nat. Hist, of N. Y., ix, p. 

 85, f. 5 (dentition). Pupa maugeri var., SOWERBY, The 

 Genera of Shells, f. 6. REEVE, Conch. Syst, pi. 170, f. 6. 



Differs from nigrescens chiefly in the spaced costulation of 

 the spire. This is subject to a good deal of variation, the 

 riblets sometimes being weak and irregular above the last 

 whorl. The tint, too, of the intermediate whorls varies a 

 good deal. Mr. Jarvis found quadricolor, rufilabris and leu- 

 cost oma at Egg Hill, and I am a good deal disposed to think 

 them merely forms of a polymorphic race, rather than true 

 varieties. 



20c. Var. rufilabris (C. B. Adams). PL 18, figs. 25, 26, 27. 



Shell rather wide below, the last two whorls of equal diam., 

 preceding whorls rapidly tapering; rather thin; gray-white 

 or slightly yellow-tinted, without markings other than a faint, 

 fine sutural w r hite line. Glossy, sculptured with sparse, irreg- 

 ularly-spaced and small riblets, becoming stronger and more 

 regular on the latter part of the last whorl. Keel slender, 

 rather low, an opaque creamy band above it. Aperture white 

 inside; peristome thin, both outer and columellar margins a 

 little retracted at their insertions. Columella not noticeably 

 folded or truncate. " Lip vermilion, sometimes whitish on 

 the inner side," but in old museum specimens fading to a 

 very faint rose tint, both front and back. 



Length 20, diam. 6.5 mm., whorls 8%. 



Length 18.3, diam. 6 mm., whorls 7%. 



Eastern Jamaica: Portland (C. B. Adams). Egg Hill, 

 Portland (P. W. Jarvis). 



Cyl. maugeri var. rufilabris C. B. A., Contrib. p. 164. (7. 

 maugeri var. PFR., Conchyl. Cab., pi. 7, f. 41, 42. ( ?) C. 

 Uandiana Pfr., in part, Conchyl. Cab., p. 71, pi. 7, f. 31, 32. 



An albinistic race of the conic Portland type of Anoma. 

 There is sometimes a white band at the keel, shaped like that 

 figured for var. quadricolor. The original figure of Helix 



