Aperture over half the alt., long and narrow, faintly showing the 

 stripes within, contracted in the middle. Peristome narrowly reflexed, 

 thin, white; outer lip narrow and arcuate above, then gently bent 

 inward, its lower two-thirds wider, with a median and a lower slight 

 inward widening; base narrow, prolonged, guttered within; col- 

 umella vertical, sinuous, with a dark con vex fold above, surmounted 

 by a white callous fold, and an inconspicuous inward thickening be- 

 low; a visible gutter at junction of columella with parietal wall. 

 Parietal wall covered with a deep brown, thin callus. 



Alt. 38, diam. 17 mill. 



Alt. 34, diam. 15 mill. 



Alt. 30, diam. 13 mill. 



Trinidad, on trees (Gill, Guppy). 



Bulimus cegotis Mke., PFEIFFER, Conchyl. Cab., p. 43, pi. 13, f. 

 5, 6. Not B. cegotis Menke, 1830. Plekocheilusaurissciuri GUPPY, 

 Ann. Mag. N. H. (3), xvii, 1866, p. 51 ; Con/. Proc. Sci. Asso. 

 Trinidad, 1866, p. . B. glaber var. aurissciuri GUPPY, Journal 

 of Conchology, Leeds, vii, p. 218 (1892). Bulimus (Plekocheilus) 

 auris-sciuri BLAND, Amer. Journ. Conch., iv, 1868, p. 182. PFR., 

 Monogr., viii, p. 110. Bulimus (Plecochilus) auris-sciuri CROSSE, 

 Journal de Conchyliologie, 1890, p. 41. Bulimulus auris-sciuri 

 PACE, Proc. Malac. Soc. Lond., i, p. 151, 152, figs, i-iv (Anatomy). 



Closely allied to A. glabra, but the mouth is longer, more pro- 

 duced and narrow below, and the shell thinner with strongly pinched 

 base as in A. distorta. It may be found to intergrade with glabra, 

 however, in which case the Trinidad form will stand as a subspecies 

 or variety, as Guppy ranks it in his latest consideration of the 

 subject. 



This form was first described and figured by Pfeifier, many years 

 ago as B. cegotis Menke, the type being from Menke's collection ; 

 but Menke had previously used the name B. cegotis asau equivalent 

 of Volida glabra Gmel., thus preventing the later definition of the 

 form in his collection under the same name. 



A. GLABRA Gmelin. PI. 41, figs. 33, 34, 35, 36, 37. 



Shell perforate, ovate-fusiform, solid and strong; whitish, with 

 numerous longitudinal purple-brown stripes, usually waved, and as 

 wide as the light intervals ; the spire often flesh colored. Surface 

 smoothish, weakly wrinkle-striate, more strongly so on the back of 

 body-whorl, where the striae are undulating and in places somewhat 



