VARICELLA. 67 



streaks, 3 or 4 on a whorl, and more or less disposed to form 

 longitudinal 'bands from whorl to whorl. 



In some striped specimens of the same general appearance 

 there are more interstitial striae, 12 or 13 in each interval on 

 the last whorl. 



13a. Var. fimbriatula, Pilsbry, n. v. PL 13, figs. 17, 21, 22. 



Similar to var. striatapex in texture and color, but more 

 slender; the riblets persist up'on the last whorl, where there 

 are 4 (or 3 l / 2 intervals) in the space of one mm., with 8 to 

 10 wavy stria? in each interval (fig. 21). The apical whorls 

 are weakly ribbed and striate (pi. 13, fig. 22). Length 7.9, 

 diam. 2, aperture 2.2 mm. long, whorls 8%- 



Jamaica (coll. C. B. Adams). 



13b. Var. pallidula Pils., n. v. PI. 13, fig. 13. 



The shell is very pale brown, without stripes. Sculpture 

 of fewer more widely spaced riblets, irregular and in part 

 subobsolete on the last whorl. Stria? about as fine as in 

 costulata, but more numerous in each interval on account of 

 tiie wider intercostal spaces. There is a faint appearance 

 of spiral stride, expressed in a slight crinkling of the striae. 

 Riblets and intervals of the embryonic shell smooth. Length 

 8.4, diam. 2.4 mm., whorls 8%. 



Jamaica (coll. A. N. S. P.). 



13-c. Var. STRIATAPEX Pilsbry, n. v. PL 13, figs. 15, 16, 19. 



The shell has the last 3 whorls pinkish-corneous, the upper 

 ones buff. 2% embryonic whorls are finely ribbed and 

 densely striate over the ribs and intervals (pi. 13, figs, 15, 

 16). The next 2y 2 or 3 whorls have spaced rib lets; then they 

 gradually become low and inconspicuous, decreasing to be 

 merely larger striae, on the last whorl about every llth being 

 larger, though it is difficult to make this out. The striae are 

 slightly waved, giving an appearance of faint spirals. Apical 

 riblets are stronger than in var. fimbriatula. Length 9, diam. 

 2.6, aperture 3 mm. 



Jamaica (C. B. Adams coll.). 



