28 STROPHOCHEILUS-BORUS. 



tract, and spreading over the parietal wall in a heavy white callus 

 with strongly defined outer edge. Alt. 81, diarn.54 mill. ; aperture 

 alt. 42, width outside col. callus and perist. 37, width of cavity 24 

 mill. 



Brazil. 



This species evidently belongs to the group of S.ovatus, but differs 

 from that species in the deeper sutures and more shortly ovate form ; 

 and although the lip is considerably thickened, indicating a fully 

 mature shell, it is scarcely in the least expanded. 



S. BRONNI Pfeiffer. PI. 16, fig. 27 ; pi. 15, figs. 18, 19. 



Shell ovate-elliptic, rather thin but strong, very dark rich brown 

 with darker streaks and a yellowish subsutural band, the apex whit- 

 ish, or reddish-brown. Nepionic whorls 3, the first H smooth, the 

 following whorl with very strong radial folds narrower than their 

 intervals, and extending from suture to suture, the next whorl with 

 the folds coarser, more spaced and rather short. Post-nepionic 

 whorls H-H, very densely and finely spirally granulate, the gran- 

 ulation becoming obsolete on last whorl and quite absent from its 

 latter two-thirds ; body- whorl having indistinct low spiral cords, and 

 some malleation. 



Aperture much over half the shell's length, narrowly pear-shaped, 

 fleshy within ; peristome narrowly reflexed, recurved, pink ; outer 

 lip rather straightened ; basal lip deeply arched ; columella straight, 

 pink, reflexed in a thin, subtransparent, faintly bluish-pink parietal 

 callus. Alt. 79, diam. 46 mill. ; apert., alt. 48, width 31 mill. ; width 

 inside peristome and columella, 21 mill. 



Brazil. 



Bulimus bronni PFR., Zeitschr. f. Malak. 1847, p. 31 ; Monogr. ii, 

 p. 22 ; Conchyl. Cab. p. 254, pi. 69, f. 1. MARTENS, Novit. Conch. 

 v, p. 16. B. browni ADS., Gen. Rec. Moll. p. 146. Helix ovata var, 

 FER., Hist. pi. 145B, f. 2. 



This species is constantly smaller than S. ovatus, the lip narrower, 

 and the folds of earlier whorls stronger. There is considerable 

 variation in the degree to which the minute granulation extends 

 upon the body-whorl, von Martens mentioning a specimen in which 

 the granulation extends to the aperture. The folds of early whorls 

 are stouter than in S. granulosus, the mouth longer, and the col- 

 umella does not extend upward in a convex fold as in that species. 



