136 THE NAUTILUS. 



marthce at any stage of growth ; the aperture is larger and more ob- 

 lique, the color is darker, and the operculum differs. This species 

 is respectfully dedicated to Mr. H. H. Smith. 



Helicina sanctcemarthce n. sp. PI. vii, fig. 4. 



Shell globose-conic, rather thin ; variously colored, yellow, cor- 

 neous-yellow or light red above, paler beneath, variegated with more 

 opaque white or whitish in spiral lines and bands, continuous or in- 

 terrupted; the suture generally having a dark red border above, 

 apex white or tinted. Surface somewhat glossy, nearly smooth to 

 the eye, but sculptured with fine growth-lines and sparse, unequal 

 and irregularly spaced spiral lines of punctures. Spire straightly 

 conic, rather acute. Whorls 4| to 5, somewhat convex, the last 

 rounded at the periphery. Aperture oblique, semicircular ; lip thin, 

 expanded and reflexed, pale yellow. Basal callus spreading far for- 

 ward, whitish in the middle, elsewhere transparent. 



Alt. 11.5, diam. 13 mm. 



Alt. 11, diam. 13.5 mm. 



Operculum bluish-white with some darker concentric lines, con- 

 cave and minutely papillose outside, the papillae not crowded. In- 

 terior glossy blackish, shading to red and then yellowish towards the 

 nucleus, a reddish border at the semicircular periphery. Straight 

 margin yellow-bordered, strengthened by a moderate ridge, which is 

 bent inward near the nucleus. 



Santa Marta Mts., Colombia, at El Libano, COOO ft. elevation, on 

 trees, especially palm leaves. 



This species closely resembles H. columbiana Phil, at first sight, 

 but it has a more straightly conic spire and entirely different minute 

 sculpture, H. columbiana being decussated with crowded spiral lines 

 crossing the growth stria?. The operculum in H. sanctcemarthce is 

 thicker than in H. columbiana, and of a different color outside, but 

 the internal structure and color are about the same. 

 Helicina cacayuelita n. sp. PI. vii, fig. G. 



Shell globose-conic, thin, pale yellow or reddish-corneous, with 

 the spire pale red, the suture margined with red above, last whorl 

 encircled with several opaque whitish bands or lines. Surface nearly 

 smooth, showing faint growth-lines and almost obsolete spirals under 

 a lens. Spire straightly conic, rather acute. Whorls 4^, somewhat 

 convex, the last rounded peripherally. Aperture oblique and semi- 



