HISPANIOLAN AND BAHAMAN ANNULARIIDAE 125 



nuclear whorls inflated, strongly rounded, the early ones marked by 

 rather distantly spaced, rather strong axial ribs, which on the last turn 

 become expanded and rounded. Of these axial ribs 157 are present on the 

 last whorl. On the early whorls the spiral sculpture is also fairly well 

 developed; on the last it is merely indicated. Here we see 16 spiral 

 threads between the summit and the periphery. The summit of the 

 whorls is slightly flattened, rendering the suture rather conspicuous. Pe- 

 riphery strongly rounded. Base short, inflated, strongly rounded, broadly 

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

 which pass also over the umbilical wall. On the base 13 spiral cords 

 are present between the periphery and the edge of the umbilicus. Those 

 near the umbiUcus are stronger than the rest. On the umbilical wall 18 

 or more rather strong spiral cords are present. Aperture broadly ovate; 

 peristome double, the outer rather flaringly expanded, forming a slight 

 auricle at the posterior angle and marked by concentric lamellae; the 

 inner moderately exserted and appressed to the outer. Operculum typi- 

 cally licinid. 



The type (U.S.N.M. No. 401966) was collected by C. R. Orcutt on 

 the east side of the River Gimbi near Saltrou, Haiti; it is a complete 

 specimen of 7.1 whorls and measures: Height, 33.2 mm.; greater di- 

 ameter, 22.3 mm.; lesser diameter, 15.5 mm. 



U.S.N.M. No. 401988 contains 29 topotypes. 



U.S.N.M. No. 402426 contains 2 specimens collected by Orcutt near 

 Saltrou. 



riCINA MICHELJINSIS, new species 



Plate 19, Figure 1 



Shell of turbinid outline, flesh-colored, with interrupted spiral bands 

 of brown; the elements making up these bands are arranged in both 

 axial and spiral series. Five of these spiral bands are present between 

 the summit and the periphery and two on the base. Nuclear whorls 2, 

 well rounded, microscopically granulose, forming a small apex. Post- 

 nuclear whorls inflated, strongly rounded, appressed at the summit, and 

 marked by retractively curved axial riblets, of which 151 are present 

 on the last whorl. The spiral sculpture consists of threads about as 

 strong as the axial ribs, 19 of which are present between the summit 

 and periphery on the last turn, and 15 on the base, and 17 on the um- 

 bilical wall. The junctions of the axial ribs and spiral threads form 

 minute nodules. Suture strongly constricted. Periphery inflated, well 

 rounded. Base short, strongly rounded, very openly umbilicated. Both 

 base and umbilical wall are also marked by the continuation of the axial 

 riblets. The last whorl is solute for about one-fifth of a turn. Aperture 

 very broadly ovate; peristome double, the outer rather broadly ex- 

 panded, narrower on the parietal wall than on the rest, somewhat fluted 

 and rayed with a brown band; the inner, strongly exserted and sHghtly 

 reflected. Operculum typically licinid. 



