144 OXYSTYLA, SOUTH AMERICAN. 



Bull. Soc. Zool. France xii, 1887, p. 193. MILLER, Malak. Bl. xxv, 

 p. 185, 1878. 



Known only by the description and figure given by Pfeiffer. The 

 folded columella apparently separates this species from 0. ponderosa 

 and 0. decolor, which are extremely similar in form and coloration. 

 See pp. 130, 131. 



O. VARIA (von Martens). PI. 32, figs. 69-77. 



Shell oblong-conic, rather thin but solid, the surface slightly glossy, 

 with slight, fine growth-wrinkles but no spiral strice or only faint stri- 

 ation in places; ground-color whitish, light yellow, light olivaceous- 

 brown or pink, generally marked with several narrow interrupted 

 blackish-brown or purple-brown girdles, and numerous narrow longi- 

 tudinal stripes above the upper girdle, and often irregular streaks or 

 blotches over the rest cf the last whorl ; usually several blackish 

 varices on the last whorl, sometimes wanting or pale. Spire long, 

 the apex obtuse, whitish. Whorls 6| 7, convex. 



Aperture small, less than half as long as the shell, somewhat oblique, 

 whitish, variously marked within ; peristome thin and acute, narrowly 

 dark-edged ; columella convex, twisted, its edge white, in old speci- 

 mens calloused ; parietal wall dark chestnut or blackish, rarely 

 colorless. 



Alt. 45, diam. 22-^, length of aperture 23 mill. 



Alt. 421, diam. 23, length of aperture 22J mill. 



Alt. 43, diam. 21, length of aperture 21J mill. 



Venezuela: Angostura (Gruner, Blume); Caracas (Ernst, Salle"); 

 British Guiana: Demerara (Cuming coll.) 



Bulimus phlogerus PFR., Monogr. ii, p. 145 (exclusive of syn- 

 onymy); Conchyl. Cab., Bulimus, p. 196, pi. 47, f. 7, 8 (?). Orthal- 

 icus phlogerus var. P and y, SHUTTLEWORTH, Notitise Malak. i, pp. 



65, 89, pi. 4, f. 1, 2 SEMPER, Reisen im Archip. Phil., Landmoll., 



p. 248, pi. 15, f. 2 (genitalia). Orthalicus varius v. MARTENS, Bin- 

 nenmoll. Venez., p. 34, in Festschr. Feier 100-jahrigen Bestehens 

 Ges. Naturforsch. Freunde zu Berlin, p. 190, pi. 1, f. 4a, 4b (1873). 

 PFR., Monogr. viii, p. 264 A chatina Jlogera POTIEZ & MIOHAUD, 

 Galerie i, p. 127, pi. 12, f. 1, 2 (young shells). 



Extremely variable in coloring, yet readily distinguished from all 

 other species of the same region by its elongated form and small aper- 

 ture. It is allied to 0. phlogera and 0. bensoni. The latter is 



