44 BULIMULUS-ANTILLEAN. 



Bulimus chrysalis PFR., Zeitsch. f. Mai., 1847, p. 14 ; Monogr. 

 ii, p. 108 ; Conchyl. Cab., p. 238, pi. 63, f. 7, 8. REEVE, C. Icon., 

 f. 382. DESH., in Fer. Hist., p. 71. ? Helix limnoides var. FER., 

 Hist., pi. 142, f. 11, 12. Bulimulus chrysalis MAZE, Journ.de 

 Conch., 1874, p. 164. BINNEY, Proc. Acad. Nat. Sci. Phila., 1874, 

 p. 53 (dentition). 



Very different from B. limnoides in the expanded peristome, not 

 thickened within, according to Pfeiffer. Maze did not find typical 

 chrysalis in Guadelupe ; a variety which he refers to that species 

 occurred at many localities, but in my opinion it is not identical 

 with Pfeiffer's species. 



B. SEMICINCTUS Pilsbry, n. sp. PI. 12, fig. 63. 



Shell narrowly umbilicated, oblong-conic, thin and fragile. 

 Chestnut-brown with a pale peripheral line; having faint growth- 

 wrinkles and microscopic epidermal spirals. Spire conic, the apex 

 obtuse, nepionic whorls forming an obliquely truncated pyramid, 

 pitted-reticulate or wrinkled above. Whorls 5J, slightly convex, 

 the last angulated in front, the angle soon disappearing. 



Aperture oblique, somewhat over half the shell's length, narrowly 

 ovate ; peristome thin, the edge pale and a trifle everted, narrowly 

 expanded, outer lip slightly sinuous, more strongly arcuate above ; 

 columella purplish, straight, its margin dilated, forming a convex 

 arched roof over the perforation. 



Alt. 19, diam. 9*7 mill.; alt. of aperture lO'l mill. 



Guadelupe (Marie, Schramm). 



Bulimulus chrysalis var. ft MAZE, Journ. de Conchyl., 1883, p. 19. 

 The aperture is decidedly larger than in B. chrysalis Pfr., and 

 the periphery is angular in front and marked with a pale line. 



B. LHERMINIERI (Fischer). PL 11, figs. 20, 21. 



Shell oblong, thin, fragile, shining, corneous, longitudinally 

 striated, spotted with numerous white dots. Whorls 5J, a little con- 

 vex, the apex obtuse, sutures lightly impressed ; the last whorl 

 longer than the rest of the shell, tapering below. 



Aperture elongate, ovoid ; columella short, thin, roseate, not cal- 

 loused ; peristome arcuate, thin, simple, a little reflexed. Alt. 24, 

 diam. 12 mill.; alt. of aperture 12 mill. (Fisch.'). 



Guadelupe ; Mountains of Petit-Bourg, over 800 meters above 

 sea-level (Dr. Lherminier) ; Central cave at the N. E. of the plateau, 

 at about 1396 meters alt. (Comert). 



