116 AURIS-EUDOLICHOTIS. 



A. SINUATA Albers. PI. 42, figs. 49, 50, 51, 52, 53, 54. 



Shell compressed umbilicate, ovate oblong, solid. Whitish or 

 yellow, irregularly striped, dotted and spotted with brown or pur- 

 ple-brown. Surface smoothish, striate on spire, the body-whorl ob- 

 scurely wrinkle-granose, and showing traces of a microscopic gran- 

 ulation. Whorls 5*, the last somewhat ascending in front, the base 

 abruptly pinched into a raised convexity defined by a scar- like groove. 

 Aperture vertical, exceeding half the alt. of shell, elliptical, angular 

 above and vfith a conspicuous notch or sinus at base. Peristome 

 white, reflexed, the edge recurved ; outer lip evenly curved, its lower 

 half or third thickened within and often denticulate, terminating 

 abruptly in a boss or tooth at the base. Columellar lip broadly re- 

 flexed, flaring forward (fig. 51). Columella white, sinuous, with a 

 long spirally entering fold above. Parietal wall covered with a 

 translucent film. 



Alt. 52, diam. 23 mill. 



Alt. 44, diam. 24 mill. 



Puerto Cabello, Venezuela (C. F. Starke and others). 



Bulimus sinuatus ALB., Malak. Bl., i, 1854, p. 32. PFR., Novit. 

 Conch., i, p. 37,. pi. 10, f. 18-20; Monogr., iv, p. 442. MARTENS, 

 Binnenmoll. Venez., in Festchr. 100-Jiihrigen Feier des Bestehens 

 Naturforsch. Fr. Berl., p. 176. 



Differs conspicuously from ^1. distorta, glabra and their allies in 

 the channel or notch at the base and the differently formed outer 

 lip. It is allied to A. euryomphala, perd'tx, etc. 



Variation is extreme in this as in other species of the group. 

 The basal notch may be either wide (fig. 49 typical), very narrow 

 (fig. 50), or even obsolete (fig. 53). The columellar lip also varies 

 in form, fig. 54 representing a specimen in which it is deeply sin- 

 used. The callous ledge within outer lip may bear several small den- 

 ticles and end in a strong tooth, or it may be smooth, with no tuber- 

 cle below. Sometimes the columellar fold is scarcely visible from in 

 front. 



A. EURYOMPHALA Jonas. PI. 42, figs. 55-61. 



Shell umbilicate, ovate-oblong, thin but rather strong. Fleshy- 

 white, with irregular, closely and strongly zig-zag brown or purplish 

 stripes-, and often scattered dots. Surface smooth, with superficial, 

 inconspicuous growth-wrinkles only. Whorls 5$, slightly convex, 

 the last gently ascending in front, the base more or less pinched up, 



