CUBAN SUBFAMILY CHONDROPOMINAE — TORRE AND BARTSCH 357 



digitations about the Naval Station. It is much smaller than the 

 typical form and has even stronger, sharper denticulations at the 

 summit than G. (C.) marginulhuni guantanarnense. It varies con- 

 siderably in color from the typical rose-colored forms to ashy gray. 

 The type, U.S.N.M. no. 493198, comes from the hill at the officers' 

 quarters at the Naval Station. It has 4 whorls remaining and meas- 

 ures: Length, 15.2 mm; greater diameter, 8.0 mm; lesser diameter, 

 7.0 mm. 



CHONDROPOMA (CHONDROPOMA) OXYTREMUM (Gundlach) Pfeififer 

 Plate 32, FJgure 4 



1860. Cyclostonia (Chondropoma) oxytremum (Gundlach) Pfeiffer, Malako- 

 zool. Blatter, vol. 7, pp. 29-30. 



Truncated shell elongate-ovate, buff with very faint interrupted 

 spiral bands of brown. The dots composing these bands are usually 

 arranged in both axial and spiral series. The whorls remaining are 

 somewhat inflated, well rounded, narrowly shouldered at the summit, 

 marked by threadlike, retractively slanting axial riblets, which are 

 strongly developed at the summit, which they render conspicuously 

 crenulate. The spiral sculpture consists of low, rounded threads, 

 which are a little broader than the axial riblets. Of these, 12 are 

 present on the last whorl between the summit and suture. The junc- 

 tions of the axial riblets and the spiral threads form slender elongate 

 nodules, which have their long axis parallel with the axial sculpture. 

 The spaces enclosed between them are not conspicuously pitted. 

 Suture narrowly channeled. Periphery well rounded. Base moder- 

 ately long, slightly inflated, well rounded, marked by the continua- 

 tions of the axial ribs and spiral threads, the latter a little w^eaker 

 than those on the spire ; the nodulation therefore also becomes some- 

 what weaker. There are two slender spiral threads within the narrow 

 umbilicus. Aperture broadly oval; peristome simple, slightly ex- 

 panded. The parietal lip is adnate to the preceding turn. Operculum 

 thin, corneous, paucispiral, with submarginal nucleus, the outside 

 covered with a thin deposit of fine calcareous granules. 



The specimen described and figured, U.S.N.M. no. 493283, is the 

 smallest of the lot of four obtained by Dr. Torre from Gundlach but 

 is the most perfect. It was collected at Gibara. It has 3.5 whorls 

 and measures: Length, 10.1 mm; greater diameter, 6.0 mm; lesser 

 diameter, 5.5 mm. 



Of the animal of this species Gundlach says, loc. sit. "On stones in 

 the neighborhood of Gibara. Animal whitish with a roseate sheen 

 particularly upon the head. Foot with white spots, snout with black- 

 ish dots. Tentacles ochre colored witli darker or greyish tip. The 



