VARICELLA. 59 



about as in V. acuticostata. The remaining whorls are very 

 convex just below the sutures, elsewhere flattened. The 

 outer lip retracts somewhat to the upper insertion. Colu- 

 mella vertical, not perceptibly truncate at the base. The 

 internal axis is slender and straight. The shell is of a 

 uniform light brown color. 



4a. Var. trinitatis Pilsbry, n. v. PI. 14, fig. 24. 



Size and shape about as in the preceding form, but the 

 ribs are more numerous and less prominent, sometimes so re- 

 duced on the last whorl as to be difficult to count; 24 to 29 

 ribs and two varices on the last whorl, 5 to 7 strias in each 

 interval. There is the same elusive appearance of spiral 

 striation noted above in Sancti Spiritus shells. 



Among rocks on the steep N.-W. side of La Vigia at 

 Trinidad (Pilsbry, 1904). 



4b. Var. cienfuegensis Pilsbry, n. v. PL 14, fig. 25. 



Smaller than any other described form of manzanillensis ; 

 whitish-corneous, somewhat glossy. There are 16 to 18 well- 

 developed, smooth, narrow ribs and two sigmoid varices on 

 the last whorl, usually with about 10 striae in each interval. 



Length 6.9, diam. 2, aperture 2.1 mm. ; whorls 8%. 



Length 6.3, diam. 2, aperture 2 mm.; whorls T 1 /^- 



Near Oienfuegos, at a place called Lagunilla (Pilsbry, 

 1904). 



Smaller than other races of V. manzanillensis but much 

 more robust than any form of V. gracillima, and further dis- 

 tinguished by the straight columella. 



5. V. SCALAKINA ('Gundl.' Pfr.). PL 15, fig. 8. 



Shell imperforate, subfusiform-turrite, thin, diaphanous, 

 pale corneous; smooth, sculptured with compressed, equi- 

 distant, but little elevated ribs, about 14 on the last whorl. 

 Spire turrite, the apex acute; suture deep; whorls 8, con- 

 vex, the last somewhat tapering basally, about one-fourth 

 the total length. Aperture oblique, subrhombic-oval ; peris- 

 tome simple, the right margin somewhat sinuous, columellar 



