222 



columella being visible through the last whorl ; pale yellowish-green. 

 Surface glossy and nearly smooth, having slight growth-wrinkles 

 only. Spire conic, the apex slightly obtuse ; suture well impressed ; 

 whorls about 5, convex, the last well rounded. Aperture broadly 

 ovate, slightly oblique ; outer lip thin and sharp ; columella slightly 

 concave or nearly straight, thin. No perceptible parietal callus. 



Alt. 13, diam. 9, longest axis of aperture 8, width 5.3 mm. 



Alt. 16, diam. 10.5, longest axis of aperture 9, width 6.5 mm. 



Environs of Bahia, Brazil (Blanchet, v. Ihering). 



Helix (Cochlogena) citrino-vitrea MORICAND, Mem. Soc. Phys. et 

 d'Hist. Nat. de Geneve, vii, p. 436, pi. 2, f. 19 (1835 or 1836) 

 Bulimus citrino-vitreus Mor., PFR., Monogr., ii, p. 149 ; Conchyl. 



Cab., p. 218, pi. 60, f. 13, 14 DESH. in Lam. An. s. Vert., viii, 



p. 246 POT. & MICH., Galerie, i, p. 135, pi. 12, f. 13, l^.Buli- 



mulus citrino-vitreus BECK, Index, p. 64 Simptdopsis citrino-vitrea 

 Mor., PFR., Monogr., vii, p. 29. CLESSIN, Malak. Bl. (n. F.), x, 



p. 168 Bulimus vitrinoides REEVE, Conch. Icon., pi. 46, f. 290 



(1848). 



Has a more elevated spire, less inflated contour, and more whorls 

 than S. boissieri. It also differs in color. Large specimens are dis- 

 tinctly perforate ; but in those of small size, a lens is required to see 

 the minute chink behind and below the columellar reflection. 



S. BOISSIERI (Moricand). PL 64, figs. 98, 99. 



Shell imperforate, globose, with short, conic, small spire ; very thin, 

 translucent ; brownish-yellow or " tawny." Surface glossy, smooth 

 except for slight growth-wrinkles, begirt at the periphery by an incon- 

 spicuous cord or angulation. Spire short, the apex a little obtuse ; 

 whorls 4, convex, the last globose. Aperture slightly oblique, 

 rounded-ovate; peristome thin and sharp; columella thin, concave 

 below, straight or slightly sigmoid above, the reflexed callus very 

 thin and adnate. 



Alt. 11.3, diam. 9.5, longest axis of aperture 8, width 6 mill. 



Alt. 12^13, diam. 10 mill (Moricand). 



Environs of Bahia, Brazil (Blanchet and others). 



Helix (Bulimus) boissieri MORIC., Mem. Soc. Phys. et d'Hist. 

 Nat. de Geneve, xi, p. 156, pi. 5, f. 24, 25 (1845 or 1846). #ft- 

 mus boissieri Moric., PFR., Monogr., ii, p. 149; Conchyl. Cab., p. 



218, pi. 60, f. 15, 16 REEVE, Conch. Icon., pi. 64, f. 449. Sim- 



pulopsis boissieri Mor., PFR., Monogr., v, p. 23. 



