.".4 STROPHOCHEILUS-BORUS. 



whorls densely granulated throughout ; last whorl flattened and de- 

 scending in front. Aperture ovate, over half the shell's length ; 

 peristome white, broadly reflexed, the margins converging; outer 

 lip well curved ; columellar lip concave below, oblique and straight- 

 ened above, broadly dilated over but not closing the umbilicus ; 

 parietal callus short, transparent-white. 



Alt. 37, diarn. 22 mill. ; alt. of aperture 22* mill. 



Alt. 31, diam. 17 mill. ; alt. of aperture 17 mill. 



Coquimbo, Huasco and Talcahuano, Chili (Orb., Hidalgo), 



Bulinus chilensis SOWB., P. Z. S., 1833, p. 36 ; Conch. Illustr., f. 

 4 (not B. (Achatina) chilensis Lesson, 1830). Bulimm crenulatus 

 PFR., Zeitschr. f. Mai., 1845, p. 46 ; Conchyl. Cab., p. 251, pi. 68, f. 

 8, 9 ; Monogr., ii, p. 53. HIDALGO, Mol. Viaje al Pacif., p. 54. 

 MARTENS, Novit. Conch., v, p. 22. B. rosaceus var. DESH., in An. 

 s. Vert., viii, p, 269 ; in Fer. Hist., pi. 139, f.22, 23. ORB., Toy. 

 dans 1'Amer. Merid. p. 304. ? B. sqiiamulatus CRIST. & JAN., 

 Villa, Disp. Syst., p. 36. 



Inhabits the same region as S. rosaceus, from which the smaller 

 size and more converging ends of peristome separate it. 



This species varies a good deal in size and proportions of length 

 to breadth ; and the umbilicus, generally quite large, is occasion- 

 ally wholly closed. The initial whorl is, when unworn, finely stri- 

 ated spirally as in the following species, from which the larger size, 

 and more remote lip-ends easily separate rosaceus. 



S. CRENELLUS Philippi. PL 15, figs. 21, 22. 



Shell subimperforate, oblong-ovate, thin, obsoletely granulated ; 

 pale brown>; spire obtuse; suture crenulated ; whorls 4, convex, 

 the last equalling five-ninths the total length, strongly descending. 

 Aperture oblong ; peristome expanded, subreflexed, moderately 

 thickened, the margins separated ; columella nearly perpendicular, 

 violaceous. 



Alt. 27, diam. 16 mill. (Phil'). 



Hacienda of Unigambal, Peru (Raimondi). 



B. crenellus PH., Malak. Bl. xiv, 1867, p. 67 ; Novit. Couch, iii, 

 p. 346, pi. 81, f. 17, 18. PFR., Monogr. vi, p. 24. 



Nearly allied to B. crenulatus Pfr., but thinner, more elliptical, and 

 much more weakly granulated ; the mouth narrower, lip thinner 

 and columella nearly vertical. 



