OXYSTYLA, SOUTH AMERICAN. 147 



There are sixty longitudinal lines on the last, 51 on the penulti- 

 mate whorl in the type specimen in the collection of Sr. Paz. In one 

 in the Madrid Museum there is a whitish zone in the middle of the 

 last whorl, interrupting most of the longitudinal stripes (fig. 50). 



0. MACANDHEWI (Sowerby). PI. 41, fig. 5. 



Shell elongated ; grayish-fulvous, streaked and zoned with brown r 

 here and there radiated with black. Apex a little obtuse, grayish- 

 lilac. Whorls 8-5, regularly increasing, a little convex, longitudinally 

 lightly striated, separated by impressed sutures, spirally marked with 

 three slightly conspicuous, brown and white articulated lines, vanish- 

 ing on the whorls after the penultimate one ; the last whorl about as 

 long as the spire, roundly convex, with a grayish-fulvous zone above, 

 brown ones at the middle and beneath ; columella nearly straight, 

 rather thin, grayish-lilac within, black outside. Aperture semioval, 

 lilac within ; peristome simple, hardly reflexed, slightly thickened, 

 black-edged ; columellar margin covered with a wide black callus 

 spreading inward. Alt. 70, diam. '60 mill.; aperture 28 mill, long, 

 16 wide (Sowerby}. 



San Diego de Cou, Peru. 



Orthalicus MacAndrewi SOWB., Journ. Linn. Soc. London xx, 

 Zoology, p. 399, pi. 25, f. 18 (December 31, 1889). 



" This species, of which I have seen only a single specimen, is 

 similar in form to 0. bensoni, but it has no spiral sculpture, and the 

 coloring consists principally of light brown zones with a few longitu- 

 dinal streaks of brown and black. The articulated painting is very 

 slight, and is only to be seen on the upper whorls." (Sowb.~) 



O. BENSONI (Reeve). PI. 31, figs. 62, 63, 64, 65. 



Shell acuminate-oval, moderately solid, purplish or fleshy-white, 

 usually covered with a greenish-yellow cuticle, and varied with 

 numerous narrow longitudinal purple-brown stripes fading at their 

 edges, or fewer wide stripes, and encircled by three narroiv girdles of 

 purple-brown oblong or arrow-shaped spots alternating with shorter 

 cream-white intervals, the basal girdle less distinct, the median and 

 upper ones ascending the spire ; one variceal streak or none. Surface 

 scarcely shining, with close and rather irregular wrinkles of growth, 

 decussated and rendered granose by fine, close, deeply- cut spiral striae . 

 Spire long, a little contracted near the obtuse apex ; whorls 7^ to 8, 



