HISPANIOLAN AND BAHAMAN ANNULARIIDAE 13 



CHONDBOPOMA (CHONDROPOMOBUS) MOBONENSE, new species 



Plate 1, Figure 5 



Shell moderately large, elongate-conic, appearing elongate-ovate when 

 truncated, of pinkish flesh-colored ground color, marked by seven in- 

 terrupted spiral bands of brown between the summit and the suture. The 

 spots composing these bands are arranged also in axial series. Base 

 with a broad subperipheral brown band, which is almost continuous, and 

 six slender interrupted bands anterior to this. The aperture is yellowish 

 flesh-colored inside, showing the subperipheral dark band strongly and 

 the rest faintly. The early whorls are decollated, those remaining moder- 

 ately rounded; their sides not quite evenly curved, the curvature being 

 less strong near the summit, below which it increases slightly. The 

 whorls are marked by retractively slanting axial riblets, which are rather 

 distantly spaced and are gathered together into tufts at the summit at 

 more or less regular intervals, the spaces between them being nar- 

 rower than the tufts, which sometimes are rather broad. In addition to 

 the axial sculpture, the whorls are marked by sculpture not fine and 

 feeble which renders the axial riblets somewhat sinuous or fluted 

 when viewed squarely. The suture is moderately constricted. Periph- 

 ery obscurely angulated. The base is short, narrowly umbilicated, 

 well rounded, and marked by the continuation of the axial ribs. The sub- 

 obsolete markings of the spire seem to be absent here, but there are four 

 rather strong spiral cords in the umbilicus and one outside. The last 

 whorl is slightly solute. Aperture broadly oval, sometimes angulated at 

 the posterior angle ; peristome simple, slightly expanded and reflected, 

 adnate on the middle of the parietal wall. The operculum is unknown. 



The type (U.S.N. M. No. 472001) was collected by Dr. W. L. Abbott 

 at Moron, which he states is at the headwaters of the river that flows 

 into the sea at Jeremie on the north coast of the southern peninsula of 

 Haiti. The type has a little more than 5 whorls remaining and measures : 

 Length, 15.6 mm.; greater diameter, 7.8 mm.; lesser diameter, 6.8 mm. 



CHONDBOPOMA (CHONDROPOMOBUS) PILSBBYI, new species 



Truncated shell varying from elongate-ovate to subcylindric. The 

 postnuclear whorls are of either flesh-colored or pale brown ground 

 color, with the base paler than the rest, and marked with flammulations 

 and fulgurations arranged both in spiral and axial series; the points of 

 the fulgurations are backwardly directed. The nuclear whorls are de- 

 collated in all our specimens. The postnuclear whorls are rather high 

 between summit and suture, well rounded, and marked by retractively 

 curved axial riblets, which are low, rounded, and separated by spaces 

 narrower than the riblets. At the summit these riblets are gathered into 

 rather prominent tufts, which form conspicuous white denticles. The 

 spiral sculpture consists of threads, which are also rounded but not 

 quite so strong as the axial riblets or quite so closely spaced as these. 



