82 TRANSACTIONS OF THE WAGNER FREE 



Cancellaria reticulata, L. 



Syst. Nat., izth ed., p. 1190. 



Tryon, Manual of Conchology, vii, p. 69, pi. 2, figs. 25, 26. 



Banks of the Caloosahatchie, below Fort Thompson. 



Pleurotoma limatulal Conrad. 



Journ. Acad. Nat. Sciences, Phila., vi, p. 224, pi. i.x, fig. 12. 



Several individuals of a small Pleurotoma were found in the banks 

 below Fort Thompson, which agree very closely with the Miocene fossil 

 from Maryland, differing from it mainly, or solely, in a somewhat pro- 

 nounced acuteness of the obliquely directed ribs. The limited number 

 of specimens at my command prevent me from absolutely determining 

 a specific identity, which, however, I firmly believe exists. The species 

 represents P. Sitcssi from the Vienna Basin. 



Conus Tryoni, nov. sp. Fig. 10. 



Shell sub-conical, sinistral, rather thin in substance ; spire more 

 elevated than in the typical cones, of about eight or nine volutions, termi- 

 nating in a prominent pointed apex ; whorls of the spire subangulated, or 

 carinated above the suture, the carination sharply but minutely crenulated 

 on the first five or six whorls ; suture bordered inferiorly by a prominent 

 raised convex line, which is followed by from four to five less prominent 

 (and occasionally quite obscure) revolving lines on the shoulders of the 

 whorls. 



Body-whorl about four-fifths the length of the shell, gently convex, 

 crossed for the greater part of its extent by numerous obscure lines or 

 composite bands, which become conspicuous toward the base, and 

 exhibit there a distinct, although irregular, alternation of coarser and 

 finer lines. 



Aperture somewhat arcuate, broadest near the base; columellar 

 surface slightly folded basally ; outer lip thin ; sinual inflection a half- 

 inch in depth. 



Length, five inches; greatest width, 2.3 inches. 



Caloosahatchie, in the banks below Fort Thompson. 



This beautiful cone, by far the largest reversed species of the genus 

 with which I am acquainted, can readily be distinguished from the only 

 other sinistral form that has thus far been described from the Tertiary 

 deposits of the Eastern United States, Conus adversaries, by its more 

 ponderous proportions, the greater relative elevation of the spire, and 

 the revolving lines on the shoulders of the whorls. These last are 

 obscured through erosion in some specimens, which then more nearly 

 approach the Miocene fossil. There appears to be a narrower form of 

 this type, which possibly represents a distinct species. It differs in the 

 more pronounced angulation of the body-whorl, the lesser relative width 



