4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 81 



Postnuclear whorls 3.2, well rounded, marked by strongly retractively 

 curved axial riblets, which grow consecutively stronger from whorl 

 to whorl. Suture moderately well impressed. Periphery angulated. 

 Base short, strongly rounded, with a smooth umbilical callus, which 

 is about one-fourth the diameter of the shell. The rest of the base 

 is marked by the continuation of the axial ribs, which become ap- 

 proximated and fused at the callus. Aperture slightly oblique, 

 broadly ovate; outer lip somewhat expanded, thickened and reflected 

 at the edge. The junction of the outer and basal lips forms a decided 

 tooth. The columella is short and curved. The parietal wall is 

 covered with a thin callus. 



Type.—TYiQ type, U.S.N.M. No. 403920, measures : Height, 1.8 mm; 

 greater diameter, 3.2 mm; lesser diameter, 2.9 mm. 



Remarks. — U.S.N.M. No. 403889 contains 9 additional topotypes. 



The present species can be distinguished at once from Lucidella 

 rugosa Pfeiffer from Haiti by its much flatter shape. 



EUTROCHATELLA BEATENSIS, new species 



Plate 2, Figxiees 7, 8, 9 



Shell minute, broadly conic, solid, flesh-colored. Nuclear whorls 

 1.1, well rounded, smooth, rather elevated. Postnuclear whorls mod- 

 erately rounded, separated by a Ioav impressed suture, marked between 

 summit and suture by faint retractively slanting incremental lines 

 and five low, rounded spiral threads, which are almost as broad as the 

 spaces that separate them, the one at the periphery being a little 

 wider than the rest. Periphery angulated. Base short, well rounded, 

 marked by seven spiral threads, which are of irregular width and 

 spacing, and of which the three nearest the umbilical wall are the 

 smallest. Aperture obliquely oval ; outer lip expanded and reflected ; 

 inner lip reflected over the base as a conspicuous callus; parietal 

 wall covered by a thin callus. 



Type.—T\iQ type, U.S.N.M. No. 403921, has 5.5 whorls, and meas- 

 ures: Height, 2 mm; greater diameter, 3.3 mm; lesser diameter, 

 3 mm. 



Remarks. — U.S.N.M. No. 403888 contains 2 additional specimens. 



This species differs from Eutrochatella eugeniama Weinland and 

 E. weinlandi Wagner in having the spiral markings less numerous 

 and much coarser. 



EUTROCHATELLA SPHAERULA, new species 



Plate 2, Figures 10, 11, 12 



Shell rather large, globose, flesh-colored, with the early whorls 

 tinged with pale yellow and the later with a rosy flush. The nuclear 



