325 Dominican Fossils — Maury 161 



CLASS PELECYPODA 



ORDER PRIONODESMACEA 



Genus Nucula Lamarck 



Nucula tenuisculpta Gabb 

 Plate 26, Figure 8 

 Nucula tenuisculpta Gabb, Trans, Amer. Phil. Soc, vol. 15, p. 255, 



1873- 



Shell oblique, roundly triangular, surface highly polished as 



though veneered; marked with faint, microscopic radiating lines, 



inner margin crenulated. Length of largest shell 4, altitude 3 



mm. This rather rare species is now figured for the first time. 



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



Genus Leda Schumacher 

 Leda pelt el la Dall 

 Plate 26, Figure 9 



Leda acuta Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 255, 1873. Not 



L. acuta Conrad 1832, nor Sowerby 1837. 

 Leda peltella Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 579, pi. 



3 2 > fi g- 5; Pt. 6, p. 1586, 1903. 



We collected great numbers of this species, literally thou ■ 

 sands of shells, in Bluff 3 . Our largest specimens attain the 

 length of 8 mm., given by Gabb and Dall, but the great major- 

 ity are about 6 mm. We have them, however, of all sizes and 

 ages. The anterior and posterior sulcations shown in Dr. Dall's 

 handsome illustration of the Jamaican shell are sometimes con- 

 spicuous, but often hardly apparent in our shells, yet all seem 

 to be the same species and identical with the Bowden form. 



Localities. — (Exp'd '16) Bluff 2 (not very common), Bluff 

 3 (extremely abundant), Cercado de Mao; Zone I (rather 

 scarce), Rio Cana at Caimito; Zone G (rare), Rio Gurabo at Los 

 Quemados. 



