DRYM^US, SOUTH AMERICAN. 307 



little flattened, the last a little shorter than the spire, rounded at 

 base, where it is belted with light red. Columella nearly straight, 

 somewhat receding ; aperture little oblique, oval; peristome simple, 

 the right margin narrowly expanded, columellar margin dilated 

 above, reflexed, flat, subappressed. Alt. 32, diam. 13 mill. ; aper- 

 ture 16 mill, long, 9 wide in the middle. (Pfr.). 



Venezuela. 



Bulimiis feriatus REEVE, Conch. Icon., pi. 54, f. 354 (preoc.). 

 Bulimns demotus REEVE, in errata, p. xi (1850. PFR., Monogr., iii, 

 p. 340. Otostomus demotus MARTENS, Binnenmoll. Venez., p. 31. 



Spotted somewhat as in maculatus, but more solid, with a conspic- 

 uous dark band around the perforation. 



D. NIGROFASCIATUS (Pfeiffer). PI. 50, figs. 98, 99 (typical), and 



f. 96, 97, 100 (var.). 



Shell perforate, ovate, thin, rather smooth ; whitish-yellow, orna- 

 mented with Jive wide black bands. Spire conic, the apex acute. 

 Whorls 6, slightly convex, the last more swollen, as long as the 

 spire. Columella straight, vertical. Aperture semioval, colored 

 within like the outside ; peristome simple, unexpanded, the right 

 margin arcuate, columellar margin dilated down to the base, nar- 

 rowly reflexed. (Pfr.). Alt. 24, diam. 14 mill. ; aperture 12 mill, 

 long, 7? wide in the middle. 



Magdalena Valley, Colombia (Cuming and Gruner collections). 



Bulimns nigrofasciatus PFR. in Philippi, Abbild. u. Beschreib. 

 neuer oder wenig gekaunter Conch., ii, p. 125, Bulimus, pi. 5, f. 7 

 (October, 1846); Monogr., ii, p. 194; iii, 416. REEVE, Conch. 

 Icon., pi. 55, f. 379 (1848). DESH. in Fer., Hist., p. 81, pi. 145, f. 

 22-24. Bulimulus nigrofasdatus STREBEL, Beitr. Mex. Land- und 

 Siissw.-conch., v, p. 90, pi. 12, f. lla, b (shell) ; pi. 13, f. 17a, b ; pi. 

 15, f. 5a, b (anatomy). 



In addition to Pfeiffer's diagnosis, given above, it may be added 

 that the apical sculpture is typical, and slight traces of spiral striaB 

 appear in places on some specimens. The band at the suture is nar- 

 row, the fourth band and umbilical patch wide. 



Var. elongatulus n. v. PI. 50, fig. 100. 



More lengthened and slender, the aperture less than half the total 

 length of shell; white, with five black-brown bands, as in the type. 



Bands ii and iii occasionally have somewhat crenate or ragged 



