19G 



G. G. Shumard in the Ripley Group, at Chatficld Point, Navarro 

 County. 



Named in honor of Col. C. G. Forshey, Superintendent of the 

 Texas Military Institute. 



Genus Ficus, Klein. 



F. (PjTLfusus) GRANOSUS, (u. sp.) Shell subpyriform, height and 

 width about equal ; spire very much depressed, acute at apex ; volu- 

 tions four, gently convex ; upper two thirds of last one very large, 

 ventricose, flattened above and gently convex on the side, lower third 

 suddenly contracted ; aperture semielliptical, longer than wide ; sur- 

 face elegantly ornamented with prominent longitudinal ribs, crossed 

 by prominent revolving lines, forming small granules at points of in- 

 tersection. On the last volution of the largest specimen before me, 

 there are eight revolving lines and eighteen longitudinal ribs. The 

 expanded portion of the same specimen is obtusely subangulated 

 above and below. The spire is proportionally more depressed in 

 young individuals. 



Length, one inch ; length of aperture, 0.90. 



A few examples only of this fine species were discovered in sep- 

 taria3 of the Ripley Group, at Chatfield Point, Navarro County. 



Collected by B. F. and G. G. Shumard and W. P. Riddell. 



Genus Turritella. 



T. CoRSiCANA, (n. sp.) Shell large, thick, elongate-conical ; spire 

 much elevated, gradually tapering to a sharp point ; volutions ten 

 to twelve, regularly increasing in size, flattened convex ; last one 

 flattened below ; suture distinctly defined, situated at the bottom of a 

 profound channel ; surface marked with three prominent, sharp, re- 

 volving carinas, separated by deep channels, which are nearly double 

 the width of the carinse. Besides the main carinas a fourth very 

 small carina is found at the base of the volution, just above the 

 suture. The volutions are also crossed by numerous, extremely fine, 

 flexuous striae of growth. 



Length, 2.60 inches ; diameter of last volution, 0.84 ; spiral angle, 20°. 



Resembles in some respect T. Tippana, Conrad, but in that species 

 there are only two revolving carinas, while ours is marked with 

 three. 



This well-marked species occurs in great abundance in septarias of 

 the Cretaceous Formation, near Corsicana and Chatficld Point, 

 Navarro County, but it is quite difficult to procure perfect specimens. 



T. WiNCnELLi, (n. sp.) Shell of moderate size, elongate-conical, 

 gradually tapering from base to apex ; volutions nine to ten, gently 

 convex ; last one convex beneath ; suture distinct, situated in a 

 moderately deep channel ; aperture subquadrate, longer than wide ; 



