1921] NATURAL SCIENCES OF PHILADELPHIA. 319 



anal fasciole. On the face of the last whorl there are 18 narrow, 

 high sph-al ridges, a smaller cord above the upper one and a strong, 

 acute cord below the suture. The outer lip is smooth within; inner 

 lip a little raised. The anal sinus is deep, rounded posteriorly, con- 

 tracted a little anteriorly. 



Length (the early whorls lost) 26.5, diam. 8.3 mm.; 6^ whorls 

 remaining. 



Type no. 3980 A. N. S. P. 



This species was at first considered a slender form of D. elocata, 

 but it is clearly distinct. Named for Miss Helen Winchester, who 

 has illustrated this paper. 



DriUia consors (Sowerby) Plate, XVI, fig. 3. 



Turris (Drillia) militaris Hinds, Gabb, Tr. Am. Philos. Soc. xv, 1873,p.207, 



(not of Hinds, Proc. Zool Soc. 1843; Reeve, Conch. Icon, No. 53.). 

 Pleurotoma consors Sowb., Q. J. Geol. Soc. vi, 1849, p. 50; Guppj\ Q. J. 

 Geol. Soc. 1876, p. 527, pi. 28, fig.7. 



It seems strange that in the absence of specimens oi D. militaris, 

 Gabb referred D. consors to that recent species. 



A specimen of D. consors, 41.6 mm. long, 12 wide, has 23 axial ribs 

 on the last whorl, and about 18 spiral cords. A strong presutural 

 keel revolves above the anal fasciole. 



It is an abundant shell. No. 2935. 



Drillia macUenta rectaxis n. subsp. Plate XVI, flgs. l, 2. 



Cf. Drillia alesidota Dall, var. macilenta Dall, Rep. Blake Gastrop., in Bull. Mus . 

 Comp. Zool. xviii, 1889, p. 85, pi. 36, fig. 1. 



Judging by the description and figure, this is very near D. ales- 

 idota macilenta Dall, but it differs by the columellar lip, which is 

 straight to the base, and by the narrower aperture. 



Length 44, diam. 10.5 mm. 



Type no. 2934 A. N. S. P.; 17 other specimens. 



Drillia gatunensis alia n. subsp. Plate XVII, flg. 7. 



Closely related to D. gatunensis Toula, but it differs by having the 

 spiral grooves simple throughout, not occupied by minor spirals on 

 the base; the vertical ribs do not retract strongly above the shoulder 

 as they do in D. gatunensis, in which the growth hues are much more 

 deeply sinuated at the anal fasciole. 



Length 31, diam. 10.5 mm. 



Length 41 mm. 



Type no. 2919 A. N. S. P. 



