48 PA L.KOSTOLOGV OF NMW YORK. 



LOXONEMA TEREBRA. 



PLATE XIV, FIGS. 6, 7. 



Loxonema Urebra, Hall. Illustrations of Devonian Fossils : Gasteropoda, pi. 14. 1876. 



Shell elongate, terebriform ; spire rapidly ascending. Volutions slightly con- 

 vex, regularly increasing from the apex, the last one scarcely ventricose, 

 about nine or ten in a length of two inches and a quarter from the base. 



Surface marked by strong, elevated, Obtusely angular striae which bend back- 

 ward abruptly a little below the suture, and make a more gentle curve 

 forward to the base of the volution. 



The specimens of this species occur as imperfect casts of the interior, or 

 impressions of the exterior surface. The figures are made from gutta-percha 

 casts, taken in the moulds of the exterior. The species is well marked, and 

 quite distinct from any of those in the Hamilton group. . 



Formation and localities. In the Upper Chemung, in Tioga and Chemung 

 counties, N. Y. 



LOXONEMA STYLIOLA. 

 PLATE XIV, FIGS. 8, 9. 

 Loxonema styl'wla, Hall. Illustrations of Devonian Fossils : Gasteropoda, pi. 14. 1876. 



Shell elongate, terebriform ; spire rapidly ascending. Volutions flattened, 

 regularly increasing from the apex, the last one scarcely ventricose, or 

 but slightly ventricose; about nine in the length of two inches and a half 

 from the base. Aperture subelliptical ; the columellar lip extended below. 



Surface showing remains of fine striae of growth, without evidence of other 

 surface-markings; suture banded. 



In figure 9, the form of the aperture is preserved, and the columellar lip 

 should be a little more extended in the figure. This specimen shows some 

 slight di (Terences in the form and degree of expansion of the volutions, and an 

 indication on the last two volutions which may prove of distinctive importance. 



