36 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



The type (U.S.N. M. No. 354980) has 4.2 whorls remaining and 

 measures: Length, 15.4 mm. ; greater diameter, 9.1 mm.; lesser diameter, 

 8.2 mm. 



CUONDBOPOMA (CHONDROPOMIUM) EUSABCUM £USABCUM (Pfelffer) 



Plate 5, Figure 5 



1854. Cyclostoma (Chondropoma) eusarcum Pfeiffer, Proc. Zool. Soc. London, 



1852, p. 143. 

 1920. Chondropoma (Chondropomium) eusarcum Henderson and Bartsch, Proc. 



U. S. Nat. Mus., vol. 58, p. 60. 



This is a small race. The specimens before me, collected by Salle, bear 

 merely the label "Santo Domingo." It is distinguished from the other two 

 races here described by being midway between them in size but having 

 the axial riblets much stronger and more distantly spaced. 



The specimen figured (U.S.N.M. No. 15 1328) has 4 whorls remaining 

 and measures: Length, 11. 8 mm.; greater diameter, 7.6 mm.; lesser 

 diameter, 7 mm. 



U.S.N.M. No. 354979 contains 3 specimens received from Sowerby 

 and Fulton and labeled "Haiti," 



U.S.N.M. No. 315 145 contains 3 specimens from the Evezard Col- 

 lection labeled "Santo Domingo." 



CH0NDB0P03IA (CHONDROPOMITM) ErSABCUM CATAMNITENSE, 



new subspecies 



Plate 5, Figure 4 



This subspecies was collected by Dr. W. L. Abbott on Catalinita Island 

 south of the Dominican Republic. It is a veritable pygmy and in its fine 

 ribbing resembles Chondropoma (Chondropomium) eusarcum puerto- 

 platense. 



The type (U.S.N.M. No. 354981) has 3.8 whorls remaining and 

 measures: Length, 9.3 mm.; greater diameter, 6.1 mm.; lesser diameter, 

 5.6 mm. 



U.S.N.M. No. 354582 contains a young topotype. 



Subgenus Chondropomella Bartsch 



1932. Chondropomella Bartsch, Proc. U. S. Nat. Mus., vol. 81, art. 6, pp. 2-3. 



Shell broadly ovate, with the postnuclear whorls inflated, well rounded, 

 narrowly tabulated at the shoulder, and marked by numerous slightly 

 retractively slanting, closely spaced axial riblets. The summit of the 

 whorls is rendered feebly crenulated by the axial riblets. Periphery well 

 rounded. Base inflated, well rounded, openly umbilicated, marked by 

 the continuation of the axial riblets and feebly developed spiral cords 

 between the periphery and the edge of the umbilicus. The umbilical wall 



