﻿Bulletin 21 126 



verse sculpture of numerous, rather sharply -defined ribs (sixteen 

 on the next to the last whorl) which tend to become fainter and 

 obsolete on the body-whorl ; subsutural band slightly nodular, 

 undulated ; aperture narrow ; canal short ; outer lip not lirate 

 within ; pillar with a moderate callus. L,ength of shell 21.5 ; of 

 aperture 4 ; greatest width 7 mm. One specimen only. 



Oak Grove, Santa Rose County, Florida. 



Cornell University collection. 



Drillia Grabaui, n. s. 

 PI. II, fig. 3. 



Shell of moderate size, strong, with about seven whorls in 

 addition to the nucleus which is eroded in both specimens in the 

 collection. Spiral sculpture of close, equal grooves with slightly 

 wider interspaces, the spirals continuing without interruption 

 over the transverse ribs and covering the surface of the shell ex- 

 cept the earlier whorls and the region just beneath the suture ; 

 subsutural band nodular ; transverse sculpture of rather sharply 

 defined ribs (seventeen on the last whorl which extend over the 

 whorls from the nodular, sub-sutural band to the succeeding 

 suture and over three-quarters of the body whorl ; notca only 

 slightly indented ; aperture rather narrow ; canal short, wide ; 

 outer lip thickened externally, not lirate within ; pillar with a 

 moderate callus. L,ength of shell 26; of aperture 11 ; greatest 

 width 9 mm. 



Chipola marls, Bailey's Ferry, Florida. 



Cornell University collection. 



Named in honor of Professor Grabau of Columbia Uni- 

 versity. 



Drillia Louisce, n. s. 



PL II, fig. 4. 



Shell small, slender, acute, with eight whorls of which the 



nuclear are smooth ; spiral sculpture consisting only of about 



eight fine, impressed lines at the base of the shell ; transverse 



sculpture of slightly fiexuous riblets which become obsolete on 



