128 PLEKOCHEILUS. 



P. SUCCINOIDES (Pfr.). Vol. x, p. 84. 



Neighborhood of Muzo 600-800 meters elev., and on the way from 

 Bogota to Ibague, Colombia (Stiibel, Conch. Mittheil., p. 158). 



P. ARGENTEUS (Jousseaume). PI. 21, fig. 70, 71. 



Shell imperforate, ovate, rather solid, most minutely granulate, 

 plicate-crenulate at the suture ; tawny, ornamented with scattered 

 chestnut dots and a few whitish streaks. Spire conic, a little obtuse. 

 Whorls 4-jL, slightly convex. Aperture oval, glossy within with scat- 

 tered chestnut dots ; columella reflexed, slightly arcuate ; peristome 

 thickened, reddish, moderately expanded throughout. Length 21- 

 25, diam. 9-12, length of aperture 9-15 mill. (Jouss). 



Merida, Venezuela, at 4000 meters elevation. 



Euritus argenteus Jouss., Bull. Soc. Philomathique de Paris (9 

 ser.), ii, p. 41, pi. 1, f. 20, 21 (1900). 



In general characters this species resembles B. veranyi Pfr., but 

 it is smaller and more globose, without an umbilical perforation; the 

 lip is of a bright rose color, and there are short folds below the suture. 



P. DALMASI Dautzenberg. PI. 21, figs. 72, 73. 



Shell imperforate, ovate, thin and subpellucid, whorls 4^, convex, 

 separated by an impressed and irregularly crenulate suture, the first 

 whorl very delicately decussate, the rest shining and ornamented 

 with irregular growth-wrinkles. Spire short and obtuse. Last 

 whorl very large, descending in front. Aperture oval ; columella 

 narrow, arcuate, a little twisted above ; lip narrowly margined and 

 almost reflexed ; the margins joined by a very thin, translucent 

 callus. Color dark-brownish corneous, the suture narrowly white or 

 yellow-margined; peristome rose white. Length 26, diam. 16, 

 aperture with peristome 16^ mill, long, 11 wide (Dautz.). 



Plecochilus dalmasi DAUTZ., Me"m. Soc. Zool. de France for 1900, 

 xiii, p. 151 ; Plekocheilus dalmasi DAUTZ., t. c., pi. 9, f. 1, 1. 



Remarkable for its small size, quite oval form with short spire, 

 thin shell, the narrow margin of the peristome, and for the uniform 

 color, without spots or flames. 



The locality is not stated by Mr. Dautzenberg, but Count R. de 

 Dalmas collected in several Caribbean islands, in Venezuela at 

 Yacua, and in the Sierra de Sta. Marta. Probably this is from the 

 latter locality. 



