60 BRACHYPODELLA, S.-G. GYRAXIS. 



above to a narrow truncation, or retaining about 7 whitish 

 whorls above the plug; tapering downwards, the last ivhorl 

 wholly free, descending in a sinuous curve about one-third the 

 whole length of the shell; rounded above, the base conspicu- 

 ously keeled, the keel subobsolete near the aperture. Surface 

 sculptured with oblique rib-striag, separated by wider inter- 

 vals, but finer and closer on the upper whorls, sharper on the 

 neck. Whorls moderately convex, the later ones marginate 

 above the suture. Aperture very oblique, subcircular, the 

 peristome expanded and reflexed. Axis (pi. 64, fig. 7) slen- 

 der and straight above, but in the last 5 whorls elevated into 

 a lamella describing a broad, corkscrew-like spiral, around a 

 central well or false umbilicus; in the last whorl straight 

 again, the lamella descending some distance in the free 

 portion. 



Length 18.6, diam. 2 mm., whorls 25 (apex entire). 



Length 16, diam. 1.8 mm., whorls 21 (apex entire). 



Eastern Cuba: Monte Libano, in Guantanamo (Gundlach) ; 

 also Monte Toro. 



Cyl. brooksiana Gundl. mss., PFR., Malak. BL, vi, 1859, p. 

 98; Novit. Conch., p. 249, pi. 63, f. 16, 17; Monogr., vi, p. 384. 

 ARANGO, Contrib., p. 124. CROSSE, J. de C., 1890, p. 239, 

 pi. 4, f. 7, la, Ib.C. & FISCHER, J. de C., 1870, p. 11 (denti- 

 tion). Cyl. brookesiana SOWERBY, Conch. Icon., xx, pi. 6, f. 

 52. ( ?) Cilindrella prusiana Gundlach, DESHAYES, An. s. 

 Vert. Bassin Paris, ii, p. 871. 



Extraordinary for the long free deviation of the last whorl, 

 and the spiral, lamellar axis, which resembles somewhat that 

 of Spirostemma. This species is named for Don Teodoro 

 Brooks, of Saltadero, one of those whose cordial welcome and 

 hospitality made it possible for Gundlach to carry on his won- 

 derfully successful researches in Guantanamo. 



16. B. GUNDLACHIANA (Poey) . Vol. XV, pi. 62, figs. 24, 25; 

 pi. 64, fig. 8. 



Shell thin, corneous, fusiform, widest near or above the 

 middle, tapering to a small apex above, also tapering down- 

 wards to the last whorl, which is largely free, descending and 



