32i Dominican Fossii^s — Maury 57 



This shell can be distinguished from D. maonisriparum by- 

 its two-whorled protoconch, rounded ribs crossed by the spirals, 

 and U-shaped sinus. 



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

 mados. 



Drillia islalindce, n. sp. 

 Plate 9, Figure 7 



Shell with a single varix on the latter half of the body 

 whorl beyond which the sculpture changes from ribbed to sub- 

 cancellate; post-nuclear whorls with narrow, sharp, oblique ribs, 

 fourteen on the penultimate whorl, present on the first half of 

 the body whorl where extra ribs may be intercalated; spiral 

 sculpture of incised lines not crossing the ribs; sub-sutural fas- 

 ciole channeled on the last half of the body whorl and marked 

 by raised growth- lines; outer and inner lips smooth; sinus 

 deep, U-shaped. Length 15, width 5.5 mm. 



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

 mados; Zone I, Rio Cana at Caimito. Varietal form, Bluff 1, 

 Cercado de Mao. 



Genus Clava Martyn 



Clava plebeia Sowerby 



Plate 9, Figure 8 



Cerithium plebeium Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, 



p. 51, 1849. 

 Cerithium plebeium Guppy, Quart. Jour., vol. 22, p. 290, pi. 16, fig. 9, 



1866. 

 Cerithium plebeium Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 238, 



1873- 

 Cerithium plebeium Guppy, Quart. Jour. Geol. Soc, vol. 32, p. 519, 



1876. 

 Clava plebeia Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, p. 290, 1892. 



The type of this species was collected by Heneken in Santo 

 Domingo and named by Sowerby. Later Guppy found it at 

 Bowden, Cumana and Anguilla. 



