168 UROCOPTIS, S. G. IDICSTEMMA. 



earlier one, their solidification into plate-like nodes in later 

 whorls of this species being secondary, and brought about by 

 the deposition of shell-stuff between the hooks. The nepionic 

 whorls are smooth. 



41. U. I^EVIGATA (' Gundl.' Pfr.). PL 44, figs. 28, 29, 34, 35. 

 Shell cylindric-fusiform, the upper third or half tapering 



to a rather wide truncation; thin; light brown or corneous, 

 somewhat transparent when fresh; surface glossy, smooth 

 except for slight growth striag, the base and last half of the 

 last whorl striate. Whorls nearly flat, the last having a cord- 

 like keel below, very shortly free in front. Aperture oblique, 

 round-oval, the peristome white, narrowly expanded, the left 

 margin somewhat reflexed. Internal pillar slender, smooth 

 and somewhat sinuous, having a spiral convexity in the last 

 two whorls, the next earlier three whorls having short oblique 

 nodes upon the median convexity, about 5 on a whorl, sepa- 

 rated by concave intervals, and concave on their two faces. 

 In earlier whorls each of the nodes becomes interrupted in 

 the middle, and is transformed into a pair of somewhat hook- 

 like processes, curving toward one another; and in the early 

 whorls the axis becomes smooth and somewhat sinuous again. 



Length 17.5, diam. 4.6 mm. ; whorls 12%. 



Length 15.6, diam. 4.5 mm.; whorls 12. 



Eastern Cuba : Prov. Santiago at Monte Toro, in the juris- 

 diction of Guantanamo, under stones (Gundlach). 



Cyl. lavigata Gundl. mss., PFR., Malak. BL, vi, 1859, p. 96 ; 

 Novit. Conch., p. 460, pi. 100, f. 29-31 (C. lacrigata at foot of 

 plate) ; Monogr., vi, p. 362. ARANGO, Fauna, p. 106. 

 CROSSE, J. de C., 1890, p. 216. 



Externally much like U. lavalleana Orb., but the last whorl 

 is only very shortly free, not descending, and it is more 

 keeled below. The two species differ widely in internal 

 structure. 



42. U. PILOTENSIS (' Gundl.' Arango). 



Shell cylindric-turrete, truncate, thin, smooth, glossy, pellu- 

 cid, corneous; suture not denticulate; whorls remaining 14, 

 a little convex, the last shortly free, descending, striate, 



