110 THE NAUTILUS. 



UKOCOPTIS (GONGYI.OSTOMA) CARA n. sp. Plate VI, figs. 27-30. 



The shell is very slender, pillar-shaped, of nearly equal diameter 

 throughout, or tapering slightly towaids the truncate summit, 

 whitish, copiously mottled and streaked with brown ; glossy, smooth 

 (or rarely showing very weak traces of widely spaced stria}), the 

 last whorl regularly thread-striatc. The whorls are slightly convex, 

 the last compressed towards its base, which is angular above the 

 origin of the neck, last hall' whorl free, tubular and descending, 

 rounded or having a weak keel below. The aperture is subcircular 

 white within, rather oblique ; peristome broadly expanding, reflexed, 

 white. The axis is encircled by two small, nearly equal lamella? 

 the upper one more oblique, the lower thinner and shortly spinose. 

 In the penultimate whorl the axis becomes noticeably gyrate and the 

 upper lamella disappears. 



Length lG.;i, diam. 2.1, aperture 2.1 mm.; 14^ whorls. 



Length 22.3, diam. 2.3, aperture 2.3 mm.; 20 whorls. 



Length 13, diam. 2 mm.; 12^ whorls. 



"San Jose locks" about 2 miles northeast of Sancti Spiritus, 

 Province of Santa Clara, Cuba, H. A. Pilsbry, April, 1904. 



Several hundred specimens were taken from the vertical rocks 

 where they clung in abundance, though in the main lodged in 

 crevices and holes, like most of the slender Gongylostomas, they vary 

 widely in size and number of whorls. No complete individuals were 

 found ; and it appears that about 12 or 15 whorls are lost in large 

 adults. 



U. earn differs from species of the U. wriylili group by having two 

 equal axial lamellae. It is probably related to the unfigured U. 

 iinpurata (Arango) which is described as fusiform-cylindric, whitish, 

 with entire spire and 17 whorls. 



UnocopTis IIIDAI.GOI CABRASENSIS, n. var. PI. VIII, fig. 1C. 



Differs from U. In'dulyoi by the sparse, weakly developed sutural 

 nodules, shorter, less closely costate neck, and by having an inter- 

 mediate collumellar lamella between the two large ones in the 

 autepenultimate whorl. The shell is corneous with white streaks 

 and maculrc, smooth except on the last whorl. Length 13^, diam. 

 in the middle 3 mm.; ( .)^ whorls remaining. Cerra de Cabras, Pinar 

 del Rio, collected by J. B. Henderson, Jr., 1009. 



