HISPANIOLAN AND BAHAMAN ANNULARHDAE 67 



section of axial and spiral elements, become more pronounced. The 

 umbilicus is moderately open and shows spiral threads. The last whorl 

 is solute for a fraction of a turn, with a decided keel at the posterior 

 angle behind the peristome. Aperture broadly oval. The peristome is 

 double; the outer moderately expanded and decidedly thickened; the 

 inner very narrow, scarcely at all exserted and appressed to the outer. 

 Operculum unknown. 



The type (U.S.N.M. No. 471960) and another specimen (U.S.N. M. 

 No. 471961) were collected by Mr. and Mrs. E. C. Leonard on coral 

 rocks between the roots of a tree on the trail west of Le Mole River, 

 northwest Haiti. It has 4.2 whorls remaining and measures: Length, 

 17.1 mm.; greater diameter, 10.4 mm.; lesser diameter, 8.3 mm. 



CHONDROPOMA (CHONDROPOMA) BROWNIANUM Weinland 



Plate 12, Figure 8 



1880. Chondropomu brownianum Weinland, Jahrb. deutschen malak. Ges., vol. 

 7, p. 347, pi. 12, fig. 14. 



Truncated shell elongate-ovate, varying in ground color from flesh 

 color through horn color to pale brown to purplish brown, unicolor or 

 usually marked with dark bands of brown, which vary greatly in differ- 

 ent individuals in intensity of color and also in the width and length of 

 the streaks that constitute them, for these spiral bands are usually inter- 

 rupted and arranged in axial and spiral series. The anterior half of the 

 base and peristome are white or almost so, even in dark-colored speci- 

 mens. Nuclear whorls 2, well rounded, forming a somewhat truncated 

 apex, smooth except for the last portion of the last turn, which shows 

 a few feeble incremental lines. The postnuclear whorls are well rounded, 

 narrowly shouldered at the summit, and marked by rather strong, well- 

 rounded, threadlike, retractively slanting axial riblets, which render the 

 summit crenulated and which are about one-third as wide as the spaces 

 that separate them. The spiral sculpture consists of very regular and 

 regularly spaced threads equaling the axial ribs in strength and render- 

 ing these nodulose at their junctions. The spaces inclosed between the 

 axial riblets and the spiral threads are shallow rectangular pits. Suture 

 strongly constricted. Periphery well rounded. The base is moderately 

 long, openly umbilicated, well rounded, and marked like the spire ; um- 

 bilicus marked by spiral threads and fine incremental lines on the 

 outer half. Last whorl solute for about one-tenth of a turn with a 

 decided angle behind the posterior angle of the aperture. Aperture pyri- 

 form; peristome simple, sUghtly expanded and very slightly reflected. 

 Operculum thin, corneous, with paucispiral submarginal nucleus, tlie 

 outside covered with a rather strong, finely granular deposit. 



I have figured two of the extreme color forms out of a lot of 93 

 specimens (U.S.N.M. No. 471941), each having a little more than 

 4 whorls. Of these, the dark-colored one measures: Length, 19 mm.; 



