58 VARICELLA. 



and subarcuately ribbed; pale -corneous. Spire elongate, the 

 apex acute. Whorls 8~y 2 , slightly convex, the last slightly 

 over one-fourth the total length, tapering at base. Aperture 

 oblique, subrhombic-oval ; peristome simple, unexpanded, the 

 margins joined by a callus ; right margin spreading forward, 

 columellar margin somewhat straightened, forming an indds- 

 tinct angle with the slightly effuse basal lip. Length 8.33, 

 diam. 2.25, aperture 2.5 x 1.25 mm. (P/r.). 



Eastern Cuba: Manzanillo (Gundlach type loc.) ; Oabo 

 Cruz and Trinidad (Gundlach, according to Arango) ; Sagua 

 de Tanamo (Arango). 



Bulimus manzanillensis Gundlach, PFR. M'alak. Bl. iv, 1857, 

 p. 172. PFR., Monogr. iv, 465; Novit. Conch, p. 428, pi. 96, 

 f . 24-26. Melaniella m., Arango, Fauna, p. 88. 



I have not seen Manzanillo or other East Cuban specimens. 

 Pfeiffer does not mention spiral striae, but his figure in the 

 Novitates Concliologicce shows them. The forms which I col- 

 lected in 'Central Cuba are referred to the species with some 

 doubt, on account of this uncertainty about the finer details 

 of sculpture. 



Form from Sancti Spiritus, pi. 14, fig. 23. About 2 or 3 

 kilometers northeast of Sancti Spiritus, among white lime- 

 stone rocks which rise conspicuously above the plain and 

 are locally known as the rocks of San Jose, I found the form 

 figured, which seems to be close to typical manzanillensis. 

 It varies remarkably in contour, specimens measuring: 



Length 9.3, diam. 2.5, aperture 2.7 mm. ; whorls 8%.- 



Length 8.1, diam. 2.75, aperture 2.8 mm. ; whorls 7%. 



Length 8.5, diam. 2.1, aperture 2.25 mm.; whorls 8%- 



Length 9.5, diam. 2.6, aperture 2.8 mm. ; whorls 8%. 



There are about 20 or 21 smooth narrow vertical riblets 

 on the last whorl, about the same in stout and slender shells, 

 and one or two sigmoid varices. Each interval bears about 8 

 to 11 low strias, wider than their interstices. The striae ap- 

 pear nearly smooth, but in places they are slightly waved, 

 giving an effect in 'certain lights and under a low power lens> 

 of spiral sculpture. Under higher magnification this appear- 

 ance is largely lost. The embryonic whorls are sculptured 



