VARICELLA. 53 



pale brown with occasional purple-brown streaks. Surface 

 lusterless, sculptured with compressed ribs, which bear flat- 

 tened projections or short spines at the shoulder, smaller ones 

 at the lower angle of the whorls. There are aboiit 12 ribs on 

 the last whorl, exclusive of one or two lower sigmoid varices. 

 Surface between the ribs is delicately, in part subobsoletely, 

 striate vertically, and bears numerous spiral threads, separ- 

 ated by wider spaces. Whorls 8~y 2 , the first half whorl 

 smooth, next 2,y 2 whorls of the embryonic shell delicately 

 striate vertically. The last embryonic whorl has a diameter 

 of fully 1 mm. Suture deeply impressed. Last whorl ob- 

 tusely biangular, flat or concave between the angles. Aper- 

 ture oblique, piriform, yellowish within; outer lip sinuous 

 and slightly expanded; columella vertical, receding at the 

 base, white. Length 10, diam. 3.25, length of aperture 3 

 mm. 



Western Cuba: Organ Mts., at Rangel, Sumidero, Jaruco 

 (Arango), and Oamoa (Cisneros). 



Bulimus acuticostatits ORB., Historia Fis. Polit. y Nat. de 

 Cuba, Moluscos, p. 93, pi. 11 Ms, f. 16-18 (1845) ; French 

 edit, i, p. 175. PFR., Monogr. ii, p. 157; iii, 394; iv, 464; 

 vi, 103; Novit. Conch, p. 426, pi. 96, f. 15-17 (var. horrida), 

 and f. 18-20 (var. fiUpensis) . GUNDLACH, Malak. Bl. iv, 

 1857, p. 43. Melaniella a., ARANGO, Fauna p. 87. CROSSE, 

 Journ. de Conch. 1890, p. 249. 



Animal whitish, but rust-colored dots give the body a mixed 

 or sprinkled color; tentacles and a lateral band from each, 

 rust-brown. In creeping, 5 to 6 waves are seen along the 

 foot. It occursi everywhere in the Organ Mountains, on 

 cliffs and stones, sometimes on trees, never numerous but al- 

 ways solitary (Gundlach, Malak. Bl. iv, 43). 



Typical specimens, described above and figured (fig. 10) 

 have been taken by Arango at Cerro de Cabras. They agree 

 exactly with Orbigny's description and figure (fig. 1) of 

 specimens from " the interior of Cuba," without exact local- 

 iity. His' type measured 12 x 3 mm., with 9 whorls. The 

 intercostal vertical striation is irregularly developed, mostly 

 weak, about as in var. horrida. 



