FAUNA OF ORTHAULAX PUGNAX ZONE. 45 



DRILLIA TAMA, new species. 

 Plate 12, fig. 23. 



Shell small, turrited, of about 7 whorls; nucleus defective, subse- 

 quent whorls sharply sculptured; suture distinct; axial sculpture of 

 (on the penultimate whorl 17) equal, narrow, not nodulous ribs, with 

 much wider intervals, which between the suture and the anal f asciole 

 are sharply retractive, in front of the fasciole slightly protractively 

 arcuate, and on the last whorl extend unaltered to the canal; spiral 

 sculpture of numerous close-set equal threads, prominent on the anal 

 fasciole and on the canal where they are more widely separated ; on 

 the last whorl these threads slightly crenulate the summits of the 

 ribs in overriding them. Aperture defective in the specimen, the 

 anal sulcus near the suture with a depressed narrow fasciole behind 

 it; pillar smooth, not callous; canal short, rather wide, hardly re- 

 curved. Height of shell 10, of last whorl 5, maximum diameter about 

 3.5 mm. 



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



One specimen from the Post collection, IT. S. Nat. Mus. No, 165039. 



Section CYMATOSYRINX Ball. 



Cymaiosyrinx Dall, Bull. Mus. Comp. Zool., vol. 18, No. 29, p. 95, 1889. 

 Type, Pleurotoma lunata Lea, Miocene of Virginia. 



DRILLIA GLYPHOSTOMA, new species. 



Plate 5, fig. 12. 



Shell small, acute, with about 9 whorls, including the small rounded 

 nucleus; surface polished, suture distinct, axial sculpture of about 

 14 narrow, flexuous rather sharp ribs with subequal interspaces, the 

 ribs cross the anal fasciole and are abruptly arcuate there, reaching 

 the suture which they slightly undulate, and in the other direction 

 extending to the canal ; the canal and base all sculptured with faint 

 spiral threads which seem to be missing on the rest of the shell; 

 aperture wide behind with a conspicuous rounded anal sulcus with 

 an outwardly flaring edge; outer lip internally much thickened, in- 

 curved with a sharp edge, but no denticulation ; body and pillar with 

 a smooth layer of callus, the canal recurved, short, with a pronounced 

 siphonal fasciole and a chink behind the pillar-callus. Height of 

 shell 15, of last whorl 8.5, of aperture 6, diameter above the outer 

 lip 4 mm. 



Tampa silex beds at Ballast Point, Tampa Bay, Florida ; two speci- 

 mens. U. S. Nat. Mus. No. 166098. 



The absence of denticulations on the pillar lip removes this species 

 from the genus Glyphostovia Gabb, which it otherwise much resem- 

 bles, and the character of the outer lip precludes a reference to 

 Clathurella. 



