126 THE NAUTILUS. 



UKOCOPTIS (COCHLODINELLA) MEDIANA, n. sp. PI. VIII, figs. 



1, 2, 3. 



The shell is cylindric-fusiform, the upper half or third tapering 

 slowly to the truncate summit; thin; whitish-corneous with some in- 

 distinct clear corneous maculation. Sculpture of thread-like rib- 

 striae, equal to or narrower than their intervals, nearly straight, 

 slightly oblique, and somewhat irregular, as though a thread were 

 here and there omitted. Close behind the lip the striation is crowded. 

 Suture distinctly denticulated by the rib-striae. The whorls are 

 slightly convex, the last very shortly free in front, with a cord-like 

 basal keel. The aperture is oblique, circular ; peristome expanded 

 and shortly reflected. The axis is slender and simple, as in U. 

 poeyana. 



Length 18, diam. 4, diam. aperture 3 mm.; ll whorls. 



Length 16.5, diam. 3.4, diam. aperture 3 mm.; 11 whorls. 



Length 13.5, diam. 3, diam. aperture 2.4 mm.; 10 whorls. 



Zaza del Medio, Province of Santa Clara, on a small rocky hill 

 close to the Cuban Central R. R., under stones. 



This species is closely related to U- poeyana, from which it differs 

 by the coarser striation, which is moreover irregular in places, while 

 in U. poeyana the sculpture is close and even. 



UnocopTis (GoNGYLOSTOMA) CANTEROiANA (Arango). PI. VIII, 

 figs. 4, 5. 



Cylfndrella canteroiana Gundlach MS., Arago, Anales Real Acad. 

 Ciencias Habana, XII, p. 284, 1876. 



A translation of the very brief and unsatisfactory description of 

 this f-pecies may be found in my Manual of Conchology, XV, p. 254. 

 In 1904 I collected it on the fine hill ' La Vigia," which forms the 

 background of the town of Trinidad, and where Gundlach had col- 

 lected the types a half-century before. I found it on the slope look- 

 ing out over the Caribbean Sea, on the west slope, and in a cave 

 near the foot. Also in the foothills of the Trinidad Mountains on 

 the west side of the valley of Trinidad, and along the trail in these 

 mountains about two miles from San Joan de Letran. 



The shell is cylindrical, the upper half or third tapering to a 

 rather narrow truncation ; uniform light brown, with lighter riblets; 

 somewhat glossy. Sculpture of even, rather strong rib-striaj, nearly 

 straight except on the last whorl or two where they are slightly 



