233 Dominican Fossils — Maury 69 



This shell intergrades with O. muticoides, but our seven meta- 

 types from Gabb show it is typically slightly broader, with a 

 lower, more deeply channeled spire. It measures about 16X7 

 mm. O. canaliculata has never been figured heretofore. It has 

 not been reported except from Santo Domingo. 



Locality. — (Exp'd '16) Bluff 2, Cercado de Mao. 



Olivella indivisa Guppy 

 Plate n, Figure 3 



Oliva oryza Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 215, 1873. Not 



oryza Lamarck. 

 Olivella indivisa Guppy, Proc. U. S. Nat. Museum, No. 1110, vol. 19, 



p. 308, pi. 30, fig. 10, 1896. 



Our Dominican shells appear slightly more convex than 

 Guppy 's Bowden type, but otherwise coincide with his figure of 

 O. indivisa. This shell is the precursor of the recent O. oryza 

 (=nivea Gmelin). 



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

 tremely abundant). 



Olivella Sancti-Dominici, n. sp. 

 Plate 11, Figure 4 



Shell elongate-ovate, highly polished, spire short, blunt; 

 whorls about four, the apical button-like, the second nearly cov- 

 ered by the third; last whorl very cylindrical; columellar callus, 

 thin, anterior plications two, distinct, followed by a number of 

 delicate transverse striae. Length 12, width 5 mm. 



This species appears to be the ancestor of O.jaspidea Gmelin, 

 now living on the Monte Cristi beach, but the spire is higher 

 and the body more ventricose in the recent shell. 



Dall cites a Bowden Olivella near jaspidea, possibly like 

 ours. 



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

 mados. 



