CUBAN SUBFAMILY CHONDROPOMINAE TORRE AND BARTSCH 329 



rupted spiral spots of brown, which are arranged in axial series and 

 make the dark coloration appear more in the nature of axial streaks 

 than spiral elements. On the base, however, this state of affairs is 

 reversed and the brown spots become almost confluent spirally. This 

 color scheme shines through the thin texture of the outer lip and 

 extends over the pale inner and outer peristome, whose ground color 

 is bluish white. Whorls moderately rounded, rather sharply denticu- 

 lated on the narrow shoulder and marked by feeble, retractively 

 slanting incremental lines and rather strong flattened spiral cords, 

 of which six are present on the flrst and second of the remaining 

 turns: on the later a finely intercalated slender thread appears in the 

 middle between these and on the last whorl this thread reaches the 

 strength of the rest. The base bears the same sculpture as the spire, 

 but the spiral sculpture of the umbilical wall is much enfeebled, ap- 

 pearing as mere lines. Suture moderately constricted; periphery 

 somewhat inflated, well rounded. Base short, slightly inflated, w^ell 

 rounded. Aperture broadly oval ; peristome double, the inner slightly 

 exserted, reflected over and adnate to the outer. The inner broadly 

 expanded, more so on the columellar wall than on the basal portion 

 of the outer lip. subauriculate at the posterior angle. Operculum 

 paucispiral, with the nucleus halfway between the marginal and sub- 

 central and covered with a thin deposit of calcareous granules. 



The type, U.S.N.M. no. 367793, was collected by Cabrera at El Yol- 

 can, south of ISIanagua. It has 3.9 wdiorls remaining and measures: 

 Length, 15.3 mm : greater diameter, 9.1 mm ; lesser diameter, 6.7 nun. 



In many ways this species resembles G. {C.) leoni but differs from 

 it in having the whorls nnich less inflated and in having the much 

 stronger sculpture. 



CHONDROPOMA (CHONDROPOMA) PFEIFFERIANUM (Poey) 



Shell large, when perfect elongate-conic, when truncated very 

 elongate-ovate, varying from flesh-color to chestnut-brown, with 

 darker interrupted spiral bands of brown ; the dots composing these 

 are always arranged in both axial and spiral series and usually be- 

 come confluent axially, giving the shell an axially banded aspect 

 rather than a spirally banded one. Interior of aperture pale brown. 

 Peristome yellowish horn-color with the dark bands showing. 

 Nuclear whorls almost 2, forming a truncated apex, all smooth except 

 the last portion of the last turn, which shows indication of both 

 axial and spiral sculpture. The postnuclear whorls are moderately 

 well rounded, narrowly shouldered at the summit, which is rendered 

 crenulated by slender nodules. These become very irregular, both 

 in strength and spacing on the later turns. The axial sculpture con- 



