200 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



The type, U.S.N.M. No. 535470, was collected by Bartsch on 

 paredones 2.5 km. from the north entrance of Paso de la Tinaja, 

 Cubitas Mountains, Camagiiey Provmce. It has 4.3 whorls remain- 

 mg and measures: Length, 13.9 mm.; greater diameter, 8.1 mm.; 

 lesser diameter, 7.0 mm. A large series of specimens were collected 

 at various stations through this pass. 



This species is named for Federico Poey, grandson of the great 

 Felipe Poey. Federico Poey is a chemist at the Central Jaronti. In 

 1928 he assisted Bartsch materially in making his explorations of the 

 Cubitas Mountains. 



OPISTHOSIPHON (CUBIT ASIPHONA) PROTRACTUM Torre and Henderson 



Plate 15, Figure 9 



1920. Opisthosiphon (Opisthosiphona) protractus (Torre and Henderson) Hender- 



son and Bartsch, Proc. U. S. Nat. Mus., vol. 58, p. 68, nomen nudum. 



1921. Opisthosiphon {Opisthosiphon) protractum Torre and Henderson, Proc. 



U. S. Nat. Mus., vol. 59, pp. 259-260, pi. 41, figs. 5, 11. 



Shell elongate-conic, varying from flesh color to pale brown, 

 marked by interrupted spiral bands of brov/n, the mterior of the 

 aperture varying with the external color ; the peristome is flesh colored 

 or tinged with pale brown. Nuclear whorls 2, small, well rounded, 

 microscopically granulose, with the last portion of the last turn showing 

 the beginning of the postnuclear sculpture. Postnuclear whorls well 

 rounded, marked by slender, retractively slanting axial riblets, which 

 are distantly spaced on the early turns and which become more closelj^ 

 approximated as the shell increases in size; on the last turn they are 

 separated by mere impressed lines. In the type 42 of these riblets 

 occur upon the first of the remaining turns, 82 upon the second, 150 

 upon the third, and 164 upon the last. At irregular intervals several 

 of these riblets are gathered into hollow tufts at the summit, those 

 between them terminating normally; these tufts are best developed 

 on the last turn and they become feebler toward the early whorls. 

 Suture well constricted. Periphery strongly rounded. Base rather 

 long, well rounded, marked by the continuation of the axial riblets 

 and by several spiral threads within the umbilicus. The umbilicus 

 itself is covered by a reflection of the outer peristome. Aperture 

 broadly oval; peristome double, the inner very strongly exserted and 

 slightly expanded on the outer lip ; the outer rather broadly expanded 

 on the parietal wall, less so on the inner lip, and only narrowly so on 

 the outer lip, forming a conspicuous auricle at the posterior angle, 

 which is rendered irregular by the siphon at the posterior angle of the 

 aperture. Operculum typically opisthosiphonid. 



The type, U.S.N.M. No. 314958, was collected by Dr. Thomas 

 Barbour at Moron, San Juan de los Perros, Camagiiey Provmce. It 



