177 Dominican Fossil^ — Maury 13 



Our specimens when compared with figures of Adams' A. 

 punctoslriatus (first found in New Bedford harbor) appear quite 

 different. The Dominican shells are slenderer and much larger, 

 ah individual measuring . 10 X .075 inches (which are the measure- 

 ments given for A . punctostriatus) is immature and with three in- 

 stead of four or five whorls. The form of the spire is also unlike 

 and the body whorl of the Dominican shell is much less inflated. 



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



Genus Acteocina Gray 



Acteocina canaliculata Say 



Plate 3, Figure 2 

 Volvaria canaliculata Say, Jour. Acad. Nat. Sci. Phila., vol. 5, p. 211. 

 Bullina canaliculata Say, Amer. Conch., pi. 39, 1830. 

 Tornatina canaliculata Guppy, Geol. Mag., p. 437, 1874. 

 Tornatina canaliculata Dall, Bull. 37 U. S. Nat. Mus., p. 84, pi. 52, fig. 



27, 1889; Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 15, 1890; Id. 



pt. 6, p. 1583, 1903. 

 Not Tornatina canaliculata d'Orbigny, De la Sagra, Hist. Pol. y Nat. 



Isla deCuba, p. 133, pi. 4 bis, figs. 21-24 (-T. ballata Kiener). 



Shell minute, cylindrical, marked by faint, arcuate, longitu- 

 dinal growth-lines; spire channeled, somewhat elevated, apex 

 projecting as a fine point; whorls about five; outer lip arcuate, 

 inner lip with a thin calcareous plate, and a single plication near 

 the base. Length 3, greatest width 1.5 mm. 



This widely distributed and variable species is now living 

 from Cape Cod to the Florida Keys and in the Gulf of Mexico. 

 Dall reports it from the Pliocene of Florida, Post-Pliocene of 

 South Carolina and Florida, and a varietal form from Bowden, 

 Jamaica. Guppy listed the species in 1874 from the Pliocene of 

 Trinidad. It has not heretofore been found in the blue clays of 

 Santo Domingo, but our shell agrees well with Say's figure of 

 the type which was collected on the coast of South Carolina. 



Localities. — (Exp'd ' 16) Bluff 3, Cercado de Mao (rare); 

 Zone H, Rio Cana near Caimito. 



