318 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



to Pleurotoma servata Conr., from the Vicksburg Oligocene. The 

 chief difference is the greater sinuosity of the growth lines of the 

 body whorl, which run backward both above and below the convex 

 portion of the whorl to near the suture; also in having a more pro- 

 minent angle at the periphery. 



Length of specimen figured 20.5 mm.; a larger specimen, fig. 5, in 

 which the spire is broken, measures 24.5 mm. Another example 

 has the nodes partially obsolete on the last whorl. 



Type no. 2940 A. N. S. P. (fig. 4), 



Drillia fusiformis (Gabb) Plate XVII, fig. 8. 



Defrancia fusiformis Gabb, Tr. Am. Philos. Soc, xv, 1873, p. 209. 



Two apical whorls are smooth, the rest having large, rounded, ax- 

 ial ribs crossed by four keel-like ridges on the whorls of the spire, 

 and about twenty on the last whorl, the intervals densely striated 

 spirally. The sinus is deep and strongly contracted in front when 

 the lip is perfect. 



Length 36, diam. 11.5 mm.; 12 whorls. 



The shell is variable in the length of the anterior canal, but the 

 extremes are connected in the series before us. 



Type no. 2937 A. N. S. P. 



Drillia henekeni (Sowerby) Plate XVI] , fig. 3. 



Pleurotoma henikeri Sowerby, Q. J. Geol. Soc, vi, 1849, p. 50, pi. 10, fig. 6. 

 Turris (Surcula) henekeni Gabb, Tr. Am. Philos. Soc. xv, p. 207. 

 Not Drillia henekeni (Sowerby), Cossmann, Journ. de Conchyl., \:<i, 1913, pi. 

 3, figs. 10, 11. 



This shell is well shown in Sowerby 's figure. There are many 



specimens in the Gabb collection, the largest 69 mm. long, 18 wide. 



No. 2936. 



Drillia sororcula Pils. and Johns. Plate XVII, fig. 6. 



Proc. A. N. S. Phila. 1917, p. 153. 



Drillia subgibbosa Pils. and Johns. Plate XVI, fig. 14 



Proc. A. N. S. Phila. 1917, p. 153. 



Drillia elocata Pils. and Johns. Plate XVI, fig. 9. 



Proc. A. N. S. Phila. 1917, p. 153. 



Drillia winchesterae n. sp. Plate XVI, figs. 7, 8. 



Very similar to D. elocata, but it is more slender with a longer 

 anterior canal and a deeper posterior sinus, the anal fasciole and 

 the spaces between the spiral ridges being distinctly striate spirally, 

 in each interval about 6 striae. There are seven broad, rounded 

 axial folds on the penult whorl and on the last, weakening on the 



