152 TRANSACTIONS OF THE WAGNER FREE 



Typhis linguiferus n. s. 

 Plate 12, figure 7. 



Miocene beds on Ten-Mile Creek, near the Chipola River, West Florida, 

 Burns, one specimen. 



Shell with two laxly-coiled, polished, peripherally-keeled nuclear whorls 

 and six subsequent whorls ; surface polished ; transverse sculpture of (on each 

 whorl four) strong, thick, rounded varices, which gradually increase from in 

 front backward, each being largest at the shoulder, where it is produced axially 

 into a linguiform, rather pointed spine, between which and the suture the varix 

 is depressed, then rises against the preceding whorl, where it is expanded and 

 appressed ; the spines are bent inward and to some extent backward, the varix 

 is strongly marked by the incremental lines and is linked to the tube, which 

 precedes it by a little elevated ridge, but there is no similar connection with' 

 the succeeding tube ; the ends of these spines are generally broken and they 

 then appear hollow for a short distance, but the spines are not pervious and 

 have no connection with the interior of the shell ; the tubes are moderately 

 large and, instead of conforming to the curves of the varices, they curve up- 

 ward, outward, a little backward and a little downward at last, though often 

 broken ; from the base of each tube a narrow ridge extends forward in har- 

 mony with the incremental lines, and behind this ridge is perceptible the mark 

 of an old resting-stage ; suture appressed and undulated by the sculpture ; 

 between the suture and the shoulder the whorl is somewhat excavated ; other 

 spiral sculpture only of a few irregular lines near the periphery, which give 

 the surface a malleated appearance, but are not elevated enough to be termed 

 threads or form continuous ridges ; the roundness of the varices is not inter- 

 rupted by them ; as there are four varices to a whorl, there are usually three 

 old canals discernible beside the one in use; there is no umbilical chink; the 

 canal is wholly closed, slender and attenuated ; the aperture small, subovate 

 and simple with an elevated rim. Max. Ion. of shell 15.O; diam. 7.2 mm. 



This species most nearly approaches T. curvirostratus of the Upper 

 Eocene, but is much more slender, smaller, and more elegant, while the 

 Eocene form has at the shoulder only a short, obtuse spine, and the tube is 

 much closer to its succeeding varix than to the preceding one ; while in the 

 present form the tube is midway or, if anything, a little more distant from 

 the succeeding varix. 



Typhis floridanus Dall. 

 Plate 9, figure 5. 

 Typhis floridanus Dall, Rep. Blake Gastr., p. 216, June, 18S9. 



Pliocene beds of the Caloosahatchie, Dall and Willcox. 

 Shell of five or six whorls exclusive of the nucleus; spire short; varices 

 on each whorl four, expanded, rather thin and sharp-edged, the whorl between 

 flattish ; at the shoulder the varix is produced into a slender twisted spine, 



