192 . 



of the last volution, in some specimens, arc garnished with a double 

 series of small indistinct nodes, situated on the middle third of the 

 volution. No traces of nodes have been observed on the turns of 

 the spire. 



This shell resembles in many respects T. Astierianus, D'Orbigny. 

 (JPalceont. Franc. T. 1, p. 578, pi. 140, figs. 8-11), from which it may- 

 be at once distinguished, by the nodes upon the last volution, when 

 they are present. In specimens without nodes, there are no well- 

 marked characters to sej)arate our shell from the foreign species. It 

 cannot be confounded with any of the known Turrilites from Ameri- 

 can strata. 



With the preceding species at Chatfield Point and Corsicana, 

 Navarro County. 



B. F. and G. G. Shumard and S. B. Buckley collectors. 



GASTEROPODA. 

 Genus Volutilithes, Swainson. 



V. Navarroensis, (n. sp.) Shell large, thin, fusiform, expanding 

 gradually from extremities to middle ; spire conical, scarcely occupy- 

 ing one fourth the total height ; volutions five or six, those of the 

 spire flattened ; last volution much elongated, sides presenting a some- 

 what regular convex curve, from suture to base ; suture distinct ; 

 aperture narrow, elliptical, occupying two thirds the total length ; 

 surface marked with rather obscure, broad, rounded folds, and fine, 

 imbricating strias of growth. 



The folds are most distinct on the inferior half of the volutions of 

 the spire and the upper part of the body volution. The striae be- 

 come quite prominent on the upper part of the volutions, and near 

 the suture are suddenly directed obliquely upwards and forwards. 

 Besides the folds and striae the surface is also ornamented with 

 prominent, rpunded, revolving carinae, separated by broad and rather 

 deep furrows. On the body volution there are eighteen carina?, the 

 two upper ones being smaller than the others, but on the turns of the 

 spire there are only four or five. 



The columella is so enveloped in the matrix that I am not able to 

 see the folds, and hence there is some doubt as to whether this shell 

 really belongs to the above genus. 



Length, 3.72 inches; width, 1.01; length of aperture, 2.48; 

 width of same about 0.48. 



Ripley Group, near Corsicana, Navarro County. 



Genus Eingicula, Deshayes. 

 R. PULCiiELLA, (n. sp.) Shell small, oblong oval ; spire moderately 

 elevated, conical, acute at tip, enlarging rather rapidly from apex 



