1921] NATURAL SCIENCES OF PHILADELPHIA. 333 



much finer and more regular, while the varices are more prominent; 

 the columellar plaits are smaller, the large upper one is thin and 

 acute, showing no trace of bifurcation. 



Cancellaria guppyi Gabb. Plate XXII, flg. 7. 



Cancdlaria guppyi Gabb, Tr. Am. Philos. Soc. xv, 1873, p. 236. 



Similar to C. harretti in sculpture, but smaller and much thicker, 

 the whorls more ventricose, the suture deep, narrowly channeled; 

 plaits of the columella prominent, the large upper one bluntly bifid. 



Length of the type figured 28, diam. 18.4 mm. 



The type and seven other specimens are no. 2990 A . N. S. P. 



Cancellaria rowelli Dall. 



Cancellaria rowelli Dall, Proc. U. S. Nat. Mus. xix, 1896, p. 307, pi. 29, fig. 1. 



Many specimens of this species were found associated with C. 

 barretti." It is perhaps most nearly related to C. urceolata Hinds, 

 found living on the west coast of Middle America". 



Cossmann's figures, Journ. de Conch. LXI, 1913, p. 53, pi. 4, fig. 

 5, 6, are probably not this species. 



Cancellaria epistomifera Guppy. Plate XXII, flg. 13. 



Cancellaria moorei Gabb, Tr. Am. Philos. Soc. xv, p. 236. Not of Guppy. 

 Can ceUaria epistomifera Guppy, Quart. Journ. Geol. Soc, xxxii, 1876, p. 520, 

 pi. 28, fig. 9. 



Gabb erroneously referred this to C. moorei Guppy, a common 

 species in the Bowden beds. A specimen is figured for comparison 

 with C gabbicma. 



Cancellaria laevescens Guppy. 



Cancellaria laevescens Guppy, Quart. Journ. Geol. Soc. xxii, 1866, p. 289, pi. 

 17, fig. 12. 



This species resembles somewhat the recent C. obesa Sowb., from 

 the west coast of Central America. The Santo Domingo specimens 

 are a small, finely sculptured form of the species, length 28, d am. 

 17.8 mm. 



Cancellaria ellipsis n. sp. Plate XXII, figs. 8. 9. 



Cancellaria tessellata Sowerby, Gabb, Ti'ans. Amer. Philos. Soc. xv, 1873, p- 

 236. Not of Sowerby. 



The shell is small, oblong, with conic spire of nearly 6 whorls, of 

 which the apparently smooth embryonic si ell comprises 1|. Sub- 

 sequent whorls have an even cancellate sculpture of equally prom- 

 inent axial riblets which are distinctty narrower than their in- 

 tervals, and spiral cords equal to their interstices, the intersections 

 raised. On the last whorl there are 24 spirals. The aperture is 



