134 OXYSTYLA, SOUTH AMERICAN. 



c 2 . Colurnella white-edged; diam. half the alt.; streaked 

 and maculated; Venezuela. varia,\>. 144 



O. OBDUCTUS Shuttleworth. PI. 25, figs. 31-36. 



Shell large, ovate-conic, with large, rather inflated body-whorl, 

 short, straightly conic spire, and obtuse apex ; thin but moderately 

 solid ; surface rather lustreless, with moderate growth-wrinkles, sub- 

 obsolete, delicate, waved microscopic spirals or none, and conspicuous 

 folds below the suture ; yellowish-brown or reddish-brown, becoming 

 whitish on the spire, which is conspicuously marked with brown stripes 

 angulated and dilated near the middle to form an interrupted girdle, 

 the stripes becoming narrower and closer on the latter part of the 

 penultimate whorl, nearly or wholly obsolete on the last whorl, which 

 shows traces of two or three narrow girdles or none, and is more or 

 less obscurely streaked obliquely, with some angulated white, and 

 wider blackish stripes in places. Dark brown varices narrow, 1 to 

 4 in number, usually all on the last whorl. Antepenultimate or next 

 earlier whorl often with a submedian band; apex with a comma- 

 shaped spot, the following two or three whorls uniform yellowish or 

 brownish. 



Aperture large, ovate, milky with some dark markings' inside ; 

 peristome narrowly brown-bordered ; columella white, straight ; pari- 

 etal callus broad and dark brown. 



Alt. 68, diam. 41, longest axis of aperture 39^ mill. 



Alt. 56, diam. 32, longest axis of aperture 32 mill. 



Venezuela : "Barquimeseto," probably Barquisimeto, S. E. of 

 Valencia (from the late dealer Ed. Miiller); on the borders of the 

 lake of Valencia (Moritz); Puerto Cabello (Strebel, Swift); Caracas 

 (Swift); Western Venezuela, on the coast (Blume). Ecuador: Nabon, 

 8000 feet above the sea (Wallis). 



Orthalicus obductus SHUTTL., Notitiaa Malac. i, p. 61, pi. 3, f. 1-3 

 (1856). PFR. Monogr. Helic. Vivent. iv, p. 587. MOUSSON, in 

 Malak Blatt. xvi, p. 179 (1869). v. MART., Die Binnenmoll. 

 Venez., p. 33 (189), pi. 2, f. 15 a, b (jaw and radula) STREBEL, 

 Beitr. Mex. Land- und Siisswasser-Conch., v, pp. 33, 34, form A, 

 no. 1, 2, 3, 5, pi. 3, f. 7a (shell), pi. 12, f. 4, 5 (radula) SEMPER, 

 Reisen im Archip. Phil., p. 248, pi. 15, f. 8 (genitalia). Zebra ob- 

 ducta MILLER, Malak. Bl. xxv, p. 186 (1878). COUSIN, Fauna 

 Malac. Rep. de P Equateur, p. 43, in Bull. Soc. Zool. France xii, p. 



