HISPANTOLAN AND BAHAMAN ANNULARHDAE 111 



together to form a small hollow cusp. The spiral sculpture consists of 

 low, broad threads, of which four are present on the first, six on the 

 second, and eight on the last of the remaining turns. These spiral threads 

 render the axial riblets slightly wavy as well as nodulose at their free 

 margin. The slender tubercles are elevated and have their long axis par- 

 allel with the axial sculpture ; the spaces enclosed between the axial and 

 spiral sculpture consist of rectangular areas that are only slightly im- 

 pressed. Suture moderately constricted, shghtly channeled. Periphery of 

 the last whorl strongly rounded. Base moderately long, well rounded, 

 narrowly umbilicated, and marked by the continuation of the axial ribs 

 and four broad, low, rounded spiral cords. Within the narrow umbilicus 

 eight additional slender spiral threads are present. Last whorl solute for 

 about one-tenth of a turn. Aperture broadly oval; peristome double, the 

 outer slightly expanded and reflected, scalloped on the outer margin 

 on the outer basal and inner lip, narrower on the parietal wall ; the inner 

 peristome is also slightly expanded and slightly reflected. Operculum 

 paucispiral with the nucleus halfway between subcentral and submar- 

 ginal; on the outside of the turns retractively slanting, moderately closely 

 spaced lamellae are present, which are fused on their inner border and 

 extend three-fourths of the way across the whorl, again slightly fusing 

 on their outer margin; the outer fourth of the turns of the chondroid 

 plate is free of lamellae. 



U.S.N.M. No. 355347 contains 2 specimens received from Sowerby 

 and Fulton, marked "Haiti." One of these, the specimen described and 

 figured, has a little over 5 whorls and measures : Height, 10.7 mm. ; 

 greater diameter, 5.4 mm. ; lesser diameter, 4.7 mm. The other specimen 

 has a little over 4 whorls and measures : Height, 8.8 mm. ; greater di- 

 ameter, 4.8 mm. ; lesser diameter, 4.0 mm. 



HAITIPOMA ABBOTTI, new species 



Plate 16, Figure 4 



Shell minute, yellowish white, elongate-ovate. Nuclear whorls decol- 

 lated. Postnuclear whorls inflated, strongly rounded, narrowly channeled 

 at the summit and marked by retractively slanting axial riblets, of which 

 70 occur on the first, 128 on the second, and no on the last turn. These 

 riblets are not all of the same width, but the heavier are a little more dis- 

 tantly spaced and are succeeded by narrower, more closely spaced in- 

 dividuals. The riblets are slightly expanded at the summit and occasion- 

 ally several of them become fused to form a small, not very conspicuous 

 hollow denticle at the summit. The spiral sculpture consists of weakly 

 developed threads, of which six occur on the first, eight on the second, 

 and nine on the last turn. The junctions of the axial riblets and spiral 

 threads form slender elongate nodules, while the spaces enclosed be- 



