NO. 2 NEW TURRITID MOLLUSKS BARTSCH 29 



third, lO on the fourth, and 19 on the last whorl and base. On the 

 columella the spaces between these lines form moderately strong 

 threads which increase in size from the insertion of the columella 

 toward its tip. Nine of them are present. Aperture moderately large, 

 decidedly channeled anteriorly and posteriorly ; the posterior channel 

 is very deeply incised. The outer lip is protracted anterior to the 

 posterior channel into a clawlike element. There is a very heavy varix 

 a little behind the outer lip on the last turn. The inner lip is reflected 

 over the columella as a heavy callus that extends over the parietal 

 wall and extends as a decided knob opposite the outer lip. 



Type. — -U.S.N.M. no. 430164, dredged at station 16, off the north 

 coast of Puerto Rico in 38 to 95 fathoms between latitude i8°29'4o" 

 N., longitude 66°o8'3o" W. and latitude i8°3i'oo" N., longitude 

 66°io'i5" W. It has 7.6 whorls and measures: Length, 7.1 mm; 

 diameter, 2.8 mm. 



Another specimen, U.S.N.M. no. 430854, not quite complete, is from 

 the same station. 



