UROCOPTIS, S. G. GONGYLOSTOMA. 193 



truncation, thin, pale brown or reddish-brown. Surface 

 glossy, very densely sculptured with fine, hair-like stricz, 

 separated by intervals of the same width. Whorls but 

 slightly convex, the last very shortly free, having a low, cord- 

 like keel below. Aperture subcircular, brown within, the 

 peristome expanded and reflexed, whitish or brown-tinted. 

 Axis encircled by three principal lamellae, the lower one 

 largest and denticulate above the middle; and in one or two 

 median whorls low rounded cords are interposed above and 

 below the lower lamella, and less conspicuously in the other 

 intervals (fig. 78). 



Length 27, diam. 6 mm. ; whorls 11. 



Length 22.5, diam. 5.7 mm.; whorls 10. 



Length 22, diam. 5.5-6.5 mm.; whorls 11 (Pfr.). 



Western Cuba: Near Cayajabos (E. Otto) ; Tetas de Mana- 

 gua (Poey) ; Camoa, Cuevas de Cotilla and Potrero Dique 

 (Arango). 



Cyl. humboldtiana PFR. in Wiegm. Archiv f. Naturg., 1840, 

 i, p. 252; Phil., Abbild., i, p. 184, pi. 1, f. 4; Mai. BL, 1854, 

 p. 210 ; Conchyl. Cab., p. 14, pi. 2, f . 20, 21 ; Monogr., ii, p. 

 373 (exclusive of var. b) ; iii, p. 570; iv, 699; vi, 368. GUND- 

 LACH, Malak. Bl., iv, 1857, p. 46 (descr. of animal. ARANGO, 

 Contrib., p. 111. BINNEY, Ann. N. Y. Acad. Sci., iii, p. 125, 

 and Proc. A. N. S. Phila. 1875, p. 252 (jaw and teeth). 

 Urocoptis (Pycnoptychia) humboldtiana Pfr., PILS. & VAN., 

 Proc. A. N. S. Phila. 1898, p. 275, pi. 18, f. 14 (axis). Helix 

 columnella Fer. Mus. ? according to Pfr. 



More lengthened and less swollen than U. striatella f and 

 more closely striate than the following form. Figs. 78, 79, 80 

 are copies of Pfeiffer's original figures in Philippi's Abbil- 

 dungen. Figs. 77, 78 (x 6) and 81 (nat. size) are from 

 specimens. 



Var. peraffinis Pils. n. v. PI. 47, figs. 82-86. 



Similar to U. humboldtiana, but somewhat more solid, less 

 shining, and the striae are ividely spaced, especially on the 

 spire. In the penult, whorl there are three or four, in the 

 next earlier four subequal cords above the lower lamella, and 

 one below it (fig. 86 x 6). 



