200 URCCCPTIS, S. G. GONGYLOSTOMA. 



and with high, subtriangular ribs, and U. dautzenbergiana, 

 with the last whorl free and descending, and having lower 

 ribs. These two forms were noticed by Poey, who, however, 

 did not consider them specifically distinct. In the "Mcmo- 

 rias sobre la Historia Natural de la isla de Cuba, ' ' II, p. 93, 

 he states that they occupy separate areas half a league 

 apart, the one (elliotti) on the mountain called Guane, the 

 other (var. b, now dautzenbergiana) on that called Paso-Real. 

 They were finally separated by Crosse in 1890. 



69. U. ELLIOTTI (Poey). PI. 48, figs. 1, 2, 3. 



Shell long-turrete, much attenuated above, rather rapidly 

 increasing in size above the middle, the lower half (or more 

 in truncate shells) much wider and somewhat cylindrical. 

 Spire normally entire or nearly so. Surface golden brown, 

 with a silken lustre, between elevated, triangular, white hol- 

 low ribs, 8 in number on the penult, whorl ; these ribs reduced 

 to low riblets on the attenuated upper portion of the spire. 

 Whorls about 32, convex, the last rounded below, not descend- 

 ing, very shortly free in front. Aperture obliquely oval or 

 subcircular, the peristome thickened and reflexed. Axis en- 

 circled with three lamellae, the upper one largest in the inter- 

 mediate whorls, the lowest lamella smallest and set with small, 

 delicate, wide-spaced spines. 



Length 24, diam. 3.5-3.8 mm. 



Length 25, diam. 4 mm. (Poey). 



Western Cuba: Sierra de Guane, Pinar del Rio (Elliott, 

 Arango) , on walls exposed to the sun. 



Cyl. elliotti POEY, Memorias, ii, pp. 37, 93, pi. 5, f. 1, 2 

 (1857). PPR., Malak. Bl., v, 1858, p. 7; Monogr., iv, p. 706; 

 Novit. Conch., p. 458, pi. 100, f. 20-22 (exclusive of var.). 

 CROSSE & FISCHER, Journ. de Conch., 1870, pp. 9, 12, 25, pi. 3, 

 f. 9-13 (teeth). ARANGO, Contrib., p. 123. SOWERBY, C. 

 Icon., xx, pi. 6, f. 47 a. CROSSE, Journ. de Conchyl., 1890, 

 p. 211, pi. 4, f. 5. 



Closely related to the next species. Named for the son of 

 Bishop Stephan Elliott, who first found the species. 



