UROCOPTIS, S. G. IDIOSTEMMA. 169 



lightly [laeviter] thread-carinate above the base. Aperture 

 oblique, subcircular, the continuous peristome narrowly ex- 

 panded throughout. 



Length 12-16, diam. 3 mm. Internal column having hooks 

 in the early whorls, in the last bilamellate, the lamellae thick 

 (Arango) . 



Eastern Cuba: Piloto-arriba x district of Mayari, prov. 

 Santiago ( Jeanneret) . 



Cylindrella lavalleana Orb. var. ?, PFR., Malak. Bl., ix, 1862, 

 p. 131, no. 52. Cyl. pilotensis Gundl. mss., ARANGO, An. Real. 

 Acad. Cien. etc. de Habana, xii, p. 283, no. 12 (1876) ; Con- 

 trib. p. 106. 



" Differs from Cyl. lavalleana Orb. by the more cylindric 

 shape, the shell being smooth except the last whorl, and the 

 suture not denticulate ; it is smaller, and the internal column 

 is bilamellate and hooked." (Arango) . In the Contribution 

 Arango states that there are two heavy laminae in the first 

 whorls, and hooks like those of uncata in the last. This re- 

 verses the statement in his original description. 



Pfeiffer remarks that it is very near C. elegans, but with 

 a short thread-like keel on the base of the last whorl, and 

 entirely smooth. I have not seen the species. 



43. U. GEMINATA (Pfeiffer). PL 45, figs. 42, 43, 53. 



" Shell rimate, cylindrical, rather widely truncate, solid, 

 gray- whitish, closely subarcuate-striate and having compressed 

 ribs, swollen into nodules above and below, close on the upper 

 whorls, rare or almost disappearing below the middle. Whorls 

 remaining 13 to 14, rather flattened, the last striate and 

 ribbed, somewhat bicarinate beneath, a furrow between the 

 carinae; anteriorly moderately frete. Internal column en- 

 circled by a thick, deeply grooved lamella which is somewhat 

 beaded. Aperture oblique, obliquely piriform, subangular 

 at the base on the right side ; peristome continuous, narrowly 

 expanded. Length 17, diam. 4 mm.; aperture 3% mm. in 

 oblique length, 2% wide." (P/V). 



Eastern Cuba : Cayo del Hey, in the jurisdiction of Mayari, 

 prov. Santiago (Wright). 



