134 TRANSACTIONS OF THE WAGNER FREE 



secondary spirals ; some of the specimens indicate that when alive the reticula- 

 tion appeared white or pale-colored on a much darker ground ; on the upper 

 whorls three or four primary spirals are visible ; whorls full and r-ounded, a 

 little turrited ; ribs apt to alternate at the suture, which is distinct, but not 

 channelled ; aperture small, shorter than one-third of the shell ; outer lip 

 with three teeth, the posterior about the middle of the lip and strongest, the 

 other two anterior to it and successively weaker ; pillar-lip with a raised mar- 

 gin on which in the fully adult are two or three transverse, short elevations 

 like teeth ; canal very short, the whorl constricted behind it. Max. Ion. of 

 shell 7.5 ; of aperture 2.0; max. lat. of shell 3.2 mm. 



Rare in the Caloosahatchie beds. 



Respectfully dedicated to Mr, F. J. Lapenotiere, of Tampa, to whom we 

 were much indebted for kind assistance in our work. This species recalls N. 

 acuta Say, but has a different sculpture, is smaller and more cylindrical. It 

 is much more slender than N. bidentata Emmons. It is not known in the 

 recent state, or from other localities than the one above cited. 



Nassa caloosaensis n. s. 

 Plate 9, figure 7. 



Shell small, with three and a half normal and three smooth, turbiniform 

 nuclear whorls ; transverse sculpture of (on the last whorl ten) narrow, mod- 

 erately elevated ribs, with wider interspaces, which completely cross the whorl 

 and have a pointed nodule or angle at the shoulder ; varix large and thick, 

 other transverse sculpture, only of faint incremental lines; spiral sculpture of 

 (on the last whorl seven or eight) sharply incised lines, of which two (the 

 posterior fainter and sometimes absent) are in front of the suture and behind 

 the shoulder, which last is formed by an ill-defined ridge connecting the angles 

 of the ribs ; on the base or anterior face of the shell are four of these lines 

 rather close together and with their interspaces convex ; between the posterior 

 line and the shoulder are two widely separated similar lines ; a deep sulcus 

 divides the base from the short, twisted canal, which is externally covered with 

 spiral threading ; the suture is distinct, but not channelled, and somewhat 

 wavy from the ribbing; the sides of the whorls are slightly flattened, the spire 

 a little turrited ; the aperture is short and broad, pointed behind ; in the mid-, 

 die of the outer lip is one stout tooth with smaller lirje in front and, less often, 

 behind it ; the inner lip is more or less granulolirate, with a raised outer mar- 

 gin and a tooth on the body near the junction of the outer lip; canal short, 

 narrow. Max. Ion. of shell 4.2 ; max. lat. 2.4 mm. 



Caloosahatchie marls, rare. 



This neat little species is not approached ver}' closely by any of the other 

 American Tertiary or recent forms of Nassa. 



An incidental examination of the types in the museum at Philadelphia 

 shows that Buccitriton altuvi and B. bellaliratus Conrad belong to the genus 



