320 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



Drillia venusta (Sowerby) Plate XVII, fig. 14. 



Pleiirotoma venusta Sowerby, Q. J. Geol. Soc. vi, 1849, p. 50, pi. 10, fig. 6. 



This species has been well figured by Sowerby and is represented 



by many examples in the Gabb collection (no. 2931). It has no 



direct relationship with D. jamaicensis Guppy, which has been 



united with it (Proc. U. S. N. Mus. vol. 19, 1896, p. 305). They 



are conspicuously diverse in sculpture, form and size, in large series 



of both we have examined. D. venusta attains a length of over 45 



mm., while 19 mm. is about the maximum size oi jamaicensis. 



Drillia jamaicensis (Gxippy) 



Pleurotoma jamaicensis Guppy, Q. J. Geol. Soc. xxii, 1S66, p. 290, pi. 16, fig. 6. 

 Drillia ebenina Dall, Trans. Wagn. Free Inst. Sci. iii, pt. 1, 1890, p. 33, pi. 

 2, fig. 8. 



Dr. Dall says of his D. ebenina, "Miocene of Santo Domingo 

 (Gabb) ; Pliocene of the Caloosahatchie beds. Recent on the shores 

 of the Gulf of Mexico from Florida to Vera Cruz." And after the 

 description, "This fine species was first found living in shallow water 

 on the Florida Keys by H. Hemphill. I find specimens of it to- 

 gether with several other species confused together under the name 

 of jamaicense Guppy in the Gabb collection at Philadelphia." 

 Some error is involved in these statements, as there is no such shell 

 in the Gabb collection, and Gabb makes no reference to ^^jamai- 

 censis " in his work. There are specimens of Pleurotoma jamaicense 

 Guppy, from Jamaica, in the collection of the Academy, obtained 

 from Mr. Vendryes and from other sources. These agree well 

 with Dr. Dall's description and figure of D. ebenina, and with speci- 

 mens from the Caloosahatchie Pliocene. 



While this species may occur in Santo Domingo, we have at 

 present no evidence that it does. 



Drillia squamosa (Gabb) Plate XVI, figs. 4, 5. 



T. {Drillia) squamosa Gabb, Trans. Amer. Philos. Soc. xv, 1873, p. 208. 

 Pleurotoma squamosa Gabb, Guppy, Q. J. Geol. Soc. 1876, p. 527, pi. 29, fig. 7. 



The whorls bear stout oblong, peripheral nodes, about 9 on the 

 penult, each over-ridden by an acute protractive raised line which 

 is a former free lip-edge. There is a strong varix a short distance 

 behind the lip. The whole surface has a fine sculpture of irregular, 

 interrupted, crimped spiral threads, the intervals densely and much 

 more minutely crossed by raised growth striae. The outer lip is 

 broken in all of the specimen. 



Length 56.5, diam. 23 mm., with 8 whorls remaining, the early 

 ones lost. 



