253 Dominican Fossils — Maury 89 



spirals follow on the whorls of the spire, but additional spirals 

 appear on the last whorl making about twelve in all; the ribs 

 extend from suture to suture but are deeply cut by the channel, 

 they number about eleven on the last whorl; aperture rather 

 narrow; outer lip somewhat thickened, with four internal denti- 

 cles, the posterior being the strongest; inner lip with a callus 

 and denticulate. Length 4.5, width 1.60 mm. 



This species has the form of the recent N. glypta but differs 

 strikingly in the deeply excavated suture, single embryonic volu- 

 tion, and adult sculpture. 



Locality. — (Exp'd '16) Bluff 3, Cercado de Mao. 



Genus Metulella Gabb 



Metulella venusta Sowerby 

 Plate 15, Figures 26, 27 



Columbella venusta Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, 



pp, 46, 47, pi. 9, fig. 6, 1849. 

 Metulella venusta Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 206, 1873. 

 Columbella venusta Guppy, Quart. Jour. Geol. Soc. London, vol. 32, 



p. 526, 1876. 



We have a number of Gabb's specimens to compare with 

 ours. M. venusta has not been found outside of Santo Domingo. 



Localities. — (Exp'd '16) Bluff 1, Cercado de Mao; Zone G, 

 Rio Gurabo at Los Quemados. 



Metulella fusiformis Gabb 

 Plate 15, Figure 28 



Metulella fusiformis Gabb, Proc. Acad. Nat. Sci. Phila., p. 270, pi. 



11, fig. 3, 1872. 

 Met'ilella fusiformis Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 



206, 1873. 



We have a metatype from Santo Domingo sent by Gabb of 

 this rare shell. It is the genotype of Metulella. Gabb thought 

 the affinities of the genus were with the Fusinae, Fischer with 

 Mangilia, and Dall with Nassarina. 



