62 Bulletin 29 326 



tural channel ornamented with rounded, longitudinal ribs with 

 narrower interspaces, the ribs number thirteen or fourteen on 

 the last two whorls; on the last whorl they tend to fade out and 

 end in a single strong varix behind the outer lip; but additional 

 ribs are intercalated, extending from the convexity of the body 

 down towards the canal ; spiral sculpture of uniform threads (four 

 or five on the penultimate whorl) which cross ribs, interspaces, 

 and varix, and extend to the base of the canal, but are replaced 

 in the sub-sutural channel by the much finer striae; outer lip 

 with a thick external varix, margin thin, bearing within six min- 

 ute denticles and one large posterior denticle; inner lip with a 

 strong posterior denticle; columella with minute, sharp, trans- 

 verse plicae; sinus deep, narrow, sub-circular. Length 12, width 

 4.5 mm. 



Locality. — (Exp'd '16) Zone I, Rio Cana, near Caimito. 



Genus Clathurella Carpenter 



Clathurella Vendryesiana Dall 



Plate 9, Figure 18 



Shell very slenderly fusiform, whorls eight, the first two 

 smooth, the following slightly carinate, the third to the sixth 

 have longitudinal riblets, later whorls only finely cancellated; 

 lip thickened; sinus deep. Length 14, width 4.5 mm. 



An exquisite shell described from Bowden and now found in 

 Santo Domingo. 



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

 mados. 



Genus Cancellaria Lamarck 



Ca?icellaria Barretti Guppy 



Plate 10, Figure i 



Cancellaria Barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 22, 



p. 289, pi. 17, fig. 11, 1866. 

 Caficellaria reticulata Gabb (in part), Trans. Amer. Phil. Soc, vol. 15, 



p. 236, 1873. Not C. reticulata L,inne. 



