ANOMA. 9 



neons or somewhat transparent-bluish; surface glossy, sculp- 

 tured with oblique rib-stria, the upper whorls smoother. 

 Whorls 12-16, but slightly convex, slowly and regularly in- 

 creasing, the last acutely keeled at the ~base, the keel cream- 

 white, with a brown spot behind the outer lip and another on 

 the base, both showing within the aperture. Aperture ob- 

 lique, angular below and guttered within; peristome discon- 

 tinuous, expanded and narrowly reflexed, the outer margin 

 sinuous, columellar margin retracted and notched, and sud- 

 denly dilated at the insertion; parietal wall covered with a 

 closely adherent callous. Axis strongly oblique and sinuous 

 in the last whorl, not truncate at its base. 



Length 18, diam. 3.3 mm., whorls remaining 11%. 



Length 21, diam. 4 mm., whorls remaining 12-16 (Pfr.). 



Jamaica (Gosse, in Mus. Cuming; Swift and A. D. Brown, 

 in coll. A. N. S. P.). 



Cylindrella gossei PFR., P. Z. S., 1845, p. 137 ; Phil., Abbild., 

 ii, p. 53 ; iii, p. 7, pi. 3, f . 10 ; Conchyl. Cab., p. 70, pi. 7, f . 29, 

 30; Monogr., ii, p. 384. Macroceramus pfeifferi MARTENS, in 

 Albers, Die Hel., 1861, p. 270 (based upon C. gossei Pfr., the 

 name changed on account of Bulimus gossei Pfr., a Microcer- 

 amus; cf. PFR. Malak. BL, xxiii, 1876, p. 215, no. 9) . 



A. gossei is narrower and more cylindric than A. tricolor, 

 more coarsely and strongly sculptured, and not tessellated. 

 The two species are otherwise nearly related. A. gossei is a 

 rare species, and its exact locality is unknown. 



2. A. TRICOLOR (Pfeiffer). PI. 17, figs. 6, 7, 8, 9. 



Shell subperforate, /tm/0rm-turrite, strongly attenuated 

 towards the truncate apex; smooth, glossy, opaque; white, 

 ornamented with translucent corneous-ashy streaks. Whorls 

 12 to 15, a little convex, the last acutely carinate at the base, 

 ascending in front, chestnut-bordered behind the lip. Aper- 

 ture oblong, the base somewhat effuse; columella obsoletely 

 folded; peristome simple, expanded, the margins not con- 

 nected, right margin sinuous, columellar margin angularly 

 reflexed above. Length 18, diam. 4.5 mm., aperture 4.5 mm. 

 long, 3.3 wide (Pfr.). 



