329 Dominican Fossil^ — Maury 65 



the inner edge, lirate within. Length 30, of body whorl 22, 

 width 16 mm. 



Our shells have a slight resemblance to the recent Oriental 

 C. laticosta Kuster. 



This, the most beautiful of the Dominican Cancellarias, is 

 named in honor of Professor G. D. Harris. 



Localities. — ■ (Exp'd '16) Zones H and I, Rio Cana at Cai- 

 mito. 



Cancellaria {Trigonostoma) gurabis, n. sp. 



Plate 10, Figure 11 



Cancellaria brevis Gabb, Trans. Amer. Phil. Soc, vol.15, p. 236, 1873. 

 Not C. brevis Sowerby, Proc. Zool. Soc, p. 52, 1832; Thesaurus 

 Conch, f. 21. 



Shell excavately shouldered, widely and deeply umbilicated; 

 whorls five, babylonic, the first two nuclear, smooth, glassy, the 

 apical small, the second enlarging rapidly; the three post-nuclear 

 whorls are cancellated by the intersection of numerous fine ribs 

 and rather strong spiral ridges usually alternating with thinner 

 spiral threads; in addition to the cancellate ornamentation, the 

 penultimate whorl bears three, and the ultimate four, narrow 

 varices somewhat more than twice as thick as the ribs; both 

 ribs, varices, and spirals extend over the strong shoulder carina 

 and across the excavated channel to the suture; they also extend 

 into the funnel-like umbilicus; aperture sub-triangular; outer lip 

 bordered externally by the fourth varix of the body whorl, the lip 

 shows within faint groovings corresponding to the external spiral 

 ridges; inner lip with two thread-like, distinct, rather distant 

 plications. Length 1 1 , width 8 mm. 



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

 mados. 



Cancellaria {Aphera) islacolonis, n. sp. 



Plate 10, Figure 12, a, b 



Cancellaria lessellata Gabb, Trans. Amer. Phil. Soc, vol. 15, p, 236, 

 1873. Not C. lessellata Sowerby, Proc. Zool. Soc, p. 51, 1832. 



