288 DRYM.EUS, SOUTH AMERICAN. 



Bulimulus interpunctus MTS., Sitzungsberichte Ges. naturf. 

 Freunde, Berlin, 1886, p. 161; CoDchol. Mittheil., ii, p. 14, pi. 40, 

 f. 6, 7. 



Of the numerous South American species of Bulimulus, B. macu- 

 latus Lea comes nearest to the present species in marking ; but that 

 is less slender and pointed, as well as diverse in sculpture and color. 

 (Martens). 



The spots are sometimes more or less confluent vertically, and the 

 upper of the two basal bands ma} 7 be broken into oblong spots. Dr. 

 von Ihering has found it at various localities and it seems to be not 

 uncommon in the province of Sao Paulo. Although resembling 

 semimaeulatus, semifasciatus and virgo in color-pattern, D. inter- 

 punctus is probably on offshoot from the D.poecilus stock. 



D. SUBPELLUCIDUS (Smith). Vol. XII, PI. 5, fig. 1. 



Shell fragile, subpellucid, narrowly perforate, long conic, shining, 

 corneous; transversely obsoletely striated, and sculptured with ob- 

 lique growth-lines. Whorls 7, a little convex, separated by a minutely 

 crenulated suture. Aperture little oblique, ovate, three sevenths 

 the length of the shell; columella a little straightened above, 

 slightly arcuate; peristome thin, moderately expanded throughout, 

 yellowish externally and within, the margin white ; columellar mar- 

 gin dilated. Alt. 23, diam. 9 ; aperture 10 mill, long, 4 wide 

 inside. (Smith"). 



Ecuador. 



Bulimus (Liostracus) subpellucidus E. A. SMITH, P. Z. S., 1877, 

 p. 364, pi. 39, f. 2. 



" This simple species is chiefly characterized by its thin texture, 

 horny color, and the yellowish tint of the peristome, the extreme 

 edge of which is whitish.' 1 



D. FLAVIDULUS (Smith). Vol. XII, PI. 5, fig. 2. 



Shell deeply rimate or perforate, ovate-pyramidal, thin, semi- 

 pellucid, shining, most minutely spirally, closely striated ; yellow- 

 ish, ornamented with series (3 on the upper, 5 on the last whorl) of 

 squarish brown spots. Spire long, conic, with slightly convex lateral 

 outlines, apex yellowish. Whorls 7, a little convex, slowly increas- 

 ing, separated by a narrow pale suture. Aperture slightly oblique, 

 oval, a little exceeding three-sevenths the length of shell ; peristome 

 thin, the right margin very narrowly (scarcely) expanded, columellar 



