HISPANIOLAN AND BAHAMAN ANNULARIIDAE 155 



near Laguna, Samana Bay, Dominican Republic. It has 5 whorls and 

 measures : Height, 5.9 mm. ; greater diameter, 6.0 mm. ; lesser diameter, 

 5.0 mm. 



U.S.N.M. No. 5041 10 contains 118 topotypes from the same source. 



ABBOTrELLA ROSALIAE (Pfeiffer) 



Plate 27, Figures 4-6 



1858. Choanopoma rosaliae Pfeiffer, Malak. Blatter, vol. 5, p. 139, pi. 2, figs. 4-6. 

 1920. Ahbottella rosaliae Henderson and Bartsch, Proc. U. S. Nat. Mus., vol. 

 58, p. 75. 



Shell small, of turbinid outline, pale yellow, marked with broad inter- 

 rupted bands of brown. Nuclear whorls 2, strongly inflated, well rounded, 

 forming an acute apex. Postnuclear whorls inflated, strongly rounded, 

 and marked by slender axial ribs, which bear feeble, somewhat spinose 

 nodules at their intersection with the spiral threads. Of these axial rib- 

 lets, 43 are present on the last turn. Of the spiral threads three are 

 present between the summit and periphery, the first of these being almost 

 midway between these two points, the last marking the periphery. Suture 

 strongly constricted. Base moderately broadly openly umbilicated, well 

 rounded, and marked by three spiral threads, while on the umbilical 

 wall there are five. Aperture circular ; peristome double, the inner sHghtly 

 exserted; the outer broadly flaringly expanded, fluted and marked by 

 slender concentric lamellae, wider on the outer lip than on the inner. 

 The operculum has a central nucleus and a slender oblique lamella. 



The specimen figured (U.S.N.M. No. 336764) is one of 7 collected 

 by Dr. W. L. Abbott at Sosua, 16 miles east of Puerto Plata, Dominican 

 Republic, It has 4.9 whorls and measures : Height, 6.2 mm. ; greater di- 

 ameter, 6.2 mm. ; lesser diameter, 3.8 mm. 



EYERDAMIA, new genus 



Shell of turbinid outline, marked by axial ribs only or by the merest 

 indications of nodules on the axial ribs. There are no spiral markings 

 in the intercostal spaces, even in the broad open umbilicus. Aperture 

 almost circular ; peristome double, the outer broadly flaringly expanded ; 

 the inner well exserted and slightly reflected. Operculum with central 

 nucleus, bearing a thin calcified, obliquely slanting lamella whose whorls 

 are separated by a broad space. 



Type species : Eyerdamia eyerdami, new species. 



KEY TO THE SPECIES OF EYERDAMIA 



Axial ribs weakly nodulose pnncesa 



Axial ribs not nodulose eyerdami 



EYERDAMIA PRINCESA, new species 



Plate 28, Figure 5 



Shell of turbinid outline, with rather broad interrupted spiral bands 

 of brown, which are almost continuous. Nuclear whorls 2, inflated. 



