CUBAN SUBFAMILY CHONDROPOMINAE TORRE AND BARTSCH 365 



KEY TO THE SUBSPECIES OF CHONDROPOMA (CHONDROPOMORUS) REVINCTUM 



Shell moderately slender and of light color revinctum 



Shell moderately stout and of darker color biserranum 



CHONDROPOMA (CHONDROPOMORUS) REVINCTUM BISERRANUM, new subspecies 



Plate 33, Figure 6 



This subspecies, which comes from the mogotes of the Dos Sierras 

 a little east of Zulueta, Santa Clara Province, differs from the typi- 

 cal form in being much darker, the interrupted spiral bands, particu- 

 larly those near the suture, being spread out into blotches almost 

 forming: fulgurations. The whorls are also more inflated and the 

 denticles are more pronounced. 



The type, U.S.N.M. no. 499681, was collected by Bartsch on the 

 mogote east of the gap of the Dos Sierras. It is a perfect specimen 

 of 7.5 whorls and measures : Length, 16.2 mm ; greater diameter, 7.8 

 mm; lesser diameter, 6.2 mm. 



CHONDROPOMA (CHONDROPOMORUS) REVINCTUM REVINCTUM (Poey) 



Plate 33, Figure 4 



1851. Cijclostoma revinctum Poey, Memorias sobre historia natural de la Isla 

 de Cuba, vol. 1, pp. 99, 106, pi. 5, figs. 24-27. 



This race was first described from Punta San Juan de los Perros, 

 Camaguey Province. Bartsch has also collected it on the paradones 

 about Punta Alegre. This race is paler than the next and a little 

 slenderer, with the whorls a little less convex and the denticles less 

 pronounced. 



The specimen figured, U.S.N.M. no. 388761, comes from Punta de 

 los Perros. It is a perfect specimen of 8 whorls and measures: 

 Length, 16.7 mm ; greater diameter, 7.5 mm ; lesser diameter, 5.8 mm. 



CHONDROPOMA (CHONDROPOMORUS) CANESCENS Pfeiffer 



Shell elongate-conic ; the color pattern varies materially, sometimes 

 even in the same locality, although as a rule there is a comparatively 

 uniform aspect to it in the same locality. The shell may be flesh-color, 

 or flesh-color with a brownish tinge. In all shells, even those that are 

 more or less unicolor on the later turns, the early whorls have at 

 least an indication of usually four interrupted spiral bands of brown. 

 These frequently are reduced to mere dots; but whether almost con- 

 tinuous or mere dots, their arrangement is in both axial and spiral 

 series. Frequently there are cloudings to the ground color, and even 

 more frequently there are axial bands of brown or dark brown 

 comma-shaped areas pending from the summit, and other blotches 

 beloAv it; or the shell may be vermiculated, flam.mulated, or ful- 



