72 Bulletin 29 236 



Marginella hispaniolana, n. sp. 

 Plate 11, Figure 8 



Shell small, short-biconic, smooth and polished, with four 

 whorls; suture indistinct, spire enameled; outer lip bordered by 

 a narrow, thick band, sharply lined off from the body whorl; 

 this band continues around the base of the shell, bordering and 

 reinforcing the canal; margin of outer lip strongly crenulate, 

 bearing about fifteen denticles; inner lip with four sharp, prom- 

 inent folds, the two anterior being stronger, longer, and more 

 oblique, the two posterior shorter, nearly transverse. Length of 

 shell 8, aperture 6, greatest width 5 m. m. 



This species is smaller and more squarely shouldered than 

 M. Sowerbyi. It recalls M. Newmani Dall from the Tampa si- 

 lex bed. 



Locality. — (Exp'd '16) Zone G, Rio Gurabo at Los Que- 

 mados. 



Marginella latissima Dall 



Marginella latissima Dall, Proc. U. S. Nat. Mus., vol. 19, no. 1110, 

 pp. 308, 309, pi. 29, fig. 11, 1896. 



Found by Gabb in the Costa Rica Pliocene and collected by 

 Bland in Santo Domingo. 



Marginella amina Dall 



* Marginella amina Dall, Proc. U. S. Nat. Mus., vol. 19, no. 1110, p- 



309, pi. 29, fig. 15, 1896. 



Collected by Bland at Potrero, Rio Amina. 



Marginella domingoensis Dall 



Marginella domingoenses Dall, Proc. U. S. Nat. Mus., vol. 19, no. 

 1110, p. 310, 1896. 



Collected on an island in Lake Henriquillo, southern Santo 

 Domingo, and also by Bland at Potrero, Rio Amina. 



