494 Mr. II. B. Preston on new Shells 



latter especially noticeable on the lower half of the body- 

 •whorl ; sutures impressed ; aperture receding towards the 

 1 iise, narrowly, inversely auriform ; columella expanded over 

 the very narrow umbilical ])erf()ration ; peristome simple. 



Alt. 2(r5, diam. maj. 9*5 mn). 



Aperture: alt. 1()"25, diam. 4 mm. 



J/ab. To the north of the llio Pilcomayo, Ciiaco, Bolivia, 

 GOO metres. 



Bulimulus (Dri/mceus) Morenoi, sp. n. (Fig. 7.) 



Shell ovate conic, narrowly perforate, i)ale yellowish white; 

 whorls G^, convex, marked with lines of growth and showing 

 traces of very fine spiral striae ; sutures impressed and 

 irregularly crenulate with lines of growth ; aperture acumi- 

 nate, oval; peristome simple; columella descending some- 

 what obliquely and reflexed over the umbilical region. 



Alt. 23'0, diam. maj. 11 mm. 



A])erlure : alt. 10"5, diam. maj. 5 mm. 



JJab. Argentina. 



Baliniuhis [Drymceus) comis, Sj). n. (Fig. 8.) 



Shell narrowly fusiform, smooth, milk-white, j)aintod on 

 the lower portion of the whorls with transverse; bands of 

 purplish and greyish black; whorls G, marked with very fine 

 lines of growth; sutures impressed; umbilicus narrow; 

 aperture inversely auriform ; peristome thin, expanded 

 especially below ; columella troisted into a fold^ and ditfused 

 into a pale purj)le callus which reaches the lip above ; 

 interior of shell pale pur])le. 



Alt. 28, diam. maj. 12 mm. 



Aperture: alt. 11*5, diam. 5*5 mm. 



llab. Bogota, United States of Colombia. 



Bulimulus {Drymceus) solidus, sp. n. (Fig. 9.) 



Shell fusiform, rather solid, very narrowly perforate, 

 smooth, polished, cream-coloured, ])ainted with two intor- 

 ruj)tod spiral bands of greyish black and five wavy transverse 

 lines and streaks of greyish purple ; whorls 5^, slightly 

 convex; sutures impiessed ; aperture ovate, somewhat 

 ohlique; j^eristome white^ rather thick, slightly reflexed; 

 columella descending obliquely and reflexed over the very 

 narrow umbilicus, white below, purple above and diffused 

 into a purjjle callus which joins the upper margin of the lip j 

 interior of shell purple. 



