FAUNA OP OETHAULAX PUGNAX ZOKE. 43 



sculpture of (on the penultimate whorl 12) narrow, rounded flexu- 

 ous ribs, equal and with subequal interspaces, extending from the 

 suture to the canal, concavely arcuate and compressed in front of the 

 suture, thus indicating the anal fasciole, then arcuately protractive 

 and in front receding to the canal ; the ribs and interspaces smooth 

 or faintly marked by incremental lines; spiral sculpture only of 

 half a dozen oblique threads on the back of the siphonal fasciole; 

 aperture moderately wide; anal sulcus wide and shallow, a narrow 

 strip of callus between it and the suture; outer lip arcuately pro- 

 duced in the middle, sharp edged with a varical rib behind it be- 

 tween which and the last regular rib the whorl is smooth; inner lip 

 and pillar with a moderately thick callus, smooth, and with a slightly 

 raised outer edge; canal short, wide, slightly recurved. Length 13, 

 maximum diameter 5 mm. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida. 



Type-specimen from the Post collection, U. S. Nat. Mus. No. 

 165033. 



DRILLIA TECLA, new species. 



Plate 12, fig. 18. 



Shell small, slender, thin, acute, elongate, with about seven 

 whorls; nucleus of one whorl and a half, smooth, slightly bulbous; 

 subsequent whorls sculptured, with a closely appressed suture, the 

 sutural edge swollen into a prominent cord; axial sculpture of (on 

 the penultimate whorl 10) narrow, rounded slightly flexuous ribs, 

 with wider smooth interspaces, extending from the anal fasciole 

 to the base of the whorl ; surface smooth, probably polished in life ; 

 spiral sculpture comprising only a smooth constriction in front of 

 the sutural cord, and on the base and canal about eight somewhat 

 alternated threads mostly with wider interspaces diminishing ante- 

 riorly; aperture wide, anal sulcus as deep as wide; outer lip thin, 

 with sharp edge and the usual varical rib behind it; body and pillar 

 smooth, not callous; canal short, wide, and deep. Length 10, maxi- 

 mum diameter 4 mm. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida. 



Type-specimen from the Post collection, U. S. Nat. Mus. No. 

 165036. 



DRILLIA SMILIA, new species. 

 Plate 12, fig. 21. 



Shell small, slender, solid, with 7 or more whorls, the apex of the 

 specimen defective as well as the outer lip; suture distinct, appressed, 

 preceded by a very strong cord w^hich separates it from the anal 

 fasciole; axial sculpture of (on the penutimate whorl 15) strong 



