1917.] NATURAL SCIENCES OF PHILADELPHIA. 157 



growth-wrinkles. The riljs are lower on the anal fasciole, which is 

 limited below by an inconspicuous cord. The ribs disappear on the 

 anterior canal. The siphonal fasciole is banded above by an acute 

 cord. Columella is nearly straight. Outer lip broken. 



Length 14, diam. (estimated) 5 mm.; 8 whorls, several at the apex 

 lost. 



Type No. 3198, A. N. S. P. 



Drillia callistopleura n. sp. 



Shell fusiform, of lU whorls. Embryonic 1| whorls smooth, 

 the first one inflated; three following whorls are angular above the 

 suture, after Avhich the whorls become convex, having slightly 

 protractive axial ribs and spirally striated intervals. On the penult 

 whorl there are nineteen axial ribs, which are slightly lower and a 

 little arcuate below the suture. Between the axial ribs, on the spire, 

 there are rounded spiral cords, about as wide as their intervals, 

 twelve on the penult whorl; on the last whorl they number about 

 thirty-six. Anteriorly the ribs weaken and the spirals pass over 

 them. There is a prominent dorsal varix. Aperture imperfect. 



Length 22.4, diam. 7 mm. 



The smooth axial ribs, and uniform, close, revolving cords dis- 

 tinguish this species. It is nearly related to the following. 



The type and 4 specimens are No. 2921, A. N. S. P. 



Drillia lissotropis dorsuosa n. subsp. 



Cf. Drillia lissotropis Dall, Bull. Mus. Comp. Zool. IX, 1881, p. 58; XVIII, 

 1889, p. 91, PI. 11, figs. 3, 4, and D. lissotropis var. perpolita Dall. 



This form has eight or nine smooth ribs on each whorl. They 

 extend from suture to suture, not being interrupted below the suture. 

 Suture bordered below with an uneven ridge, the intercostal valleys 

 slightly pitted below the ridge. There is a rather prominent varix 

 about one-fourth whorl behind the aperture. The outer lip is broken 

 away. A callous nodule on the body borders the posterior sinus. 



Length 8.8, diam. 3 mm.; 9 whorls. 



Drillia foveolata n. sp. 



There are twelve rounded, slightly protractive ribs on the penult 

 whorls, the intervals having sharply impressed spiral lines, seven on 

 the penult whorl. There is a low, rounded ridge below the suture, 

 the intercostal valleys somewhat pitted below it. There is a promi- 

 nent varix about one-fourth whorl behind the aperture. The outer 

 lip is broken. 



Length 14.3 diam, 5 mm.; llf w^horls. 



