BULIMULUS. 135 



umbilicus. Aperture subhorizontal, rounded-triangular, brownish 

 inside ; peristome broadly flaring, continuous, pale at the edge, 

 brown within, the basal and columellar margins reflexed, a deep, 

 narrow groove entering from the position of the keel. 



Alt, 12, diam. 30 mill. (type). 



Alt. 11, diam. 28 mill. 



Peru : Rio Yonan, at 4000 ft. elevation (C. T. Baron). 



Helix (Xenothauma) baroni FULT., Ann. Mag. N. H. (6), xviii, 

 p. 101 (July, 1896); xx, pi. 6, f. 7, 7a (Aug., 1897). CROSSE, 

 Journ. de Conchyl. xlvi, 1898, p. 206, pi. 10, f. 1. 



The general resemblance of this species to the Madeiran Geomitra 

 delphinula Lwe., and the European and North African Helix gual- 

 teriana L., viola Ponsonby, and sultana Morelet, has been com- 

 mented on by Mr. Fulton. In South America it has most resem- 

 blance to Bulimulus (Platybostryx) eremothauma Pils., as Crosse has 

 remarked. 



Genus BULIMULUS Leach. 



Section Peronseus Alb. 

 B. BAERI (Dautzenberg). PI. 48, figs. 41, 42. 



Shell rather solid, lengthened, turreted, narrowly rimate. Whorls 

 11, little convex, separated by an impressed suture, the first smooth, 

 the rest ornamented with oblique longitudinal riblets, more irregular 

 and lower on the last whorl. Aperture small, the margins hardly 

 converging. Columella a little straightened, slightly reflexed ; outer 

 lip simple, acute. Color blue-white, marked with very irregular 

 brown longitudinal streaks, the upper whorls corneous and subtrans- 

 lucent ; umbilical chink bordered with brown ; peristome white, the 

 columella brown tinted, throat fulvous. Length 14^, width 3^ mill.; 

 aperture 3^ mill, long, 2-J- wide (Dcwtz.) 



Peru : locos (M. Baer). 



Peronaeus baert DAUTZ., Jeurn. de Conchyl. xlix, p. 131 (July, 

 1901); p. 214, pi. 8, f. 3, 4. 



B. IOCOSENSIS (Dautzenberg). PL 48, figs. 43, 44. 



Shell not very solid, long-turreted, shortly and very narrowly rim- 

 ate, the spire with attenuated apex. Whorls 11, little convex, sepa- 

 rated by an impressed suture, the first smooth, the rest ornamented 

 with longitudinal, arcuate, irregular, remote, waved and granulose 



