182 APPENDIX E. PALEONTOLOGY. 



It resembles Terebratula wacoensis, (F. Roemer, Kreidebild. Texas, 

 81, taf. vi, fig. 2, a-c,) but differs in the character of the surface, which 

 in T. Choctawensis is thickly studded over with minute puncta. It is 

 also a smaller species ; the area is not so wide comparatively, and the 

 front is not so broadly truncate. 



This beautiful Terebratula was obtained from the cretaceous deposites 

 near Fort Washita, where it is quite rare, a single specimen only having 

 been found. 



Globiconcha (Ttlostoma) tumid a, Shumard. 

 Palaeontology, PL 5, fig. 3. 



Shell ovate-globose, spire pyramidal, volutions about six, whorls mod- 

 erately convex ; width of body whorl equal to about one half the length 

 of the shell. Length 1 7-10 inch, width 1 3-10 inch. 



All the specimens we have seen are badly preserved internal casts. 

 Occurs at Cross-Timbers, Texas, in cretaceous limestone. 



Globiconcha (?) elevata, Shumard. 

 Paleontology, PI. 4, fig. 4. 



Shell ovate, spire produced, whorls six regularly convex, body whorl 

 shorter than spire. Length 1 5-10 inch, breadth 1 inch. 



This is likewise an internal cast. It occurs with the preceding 

 species. 



Eulima (?) subfusiformis, Shumard. 

 Paleontology, PI. 4, fig. 3. 



Shell subfusiform, elongate smooth, spire produced, regularly conical ; 

 whorls about six, broad, very slightly convex ; suture rather shallow, 

 linear, aperture simple, sub-ovate ; body whorl obtusely angulated. 

 Length 2 8-10 inches, width 1 1-10 inch. 



The collection contains only a single specimen of the cast of this 

 species, and that badly weather-worn. It was found at Camp No. 4, 

 Cross-Timbers, Texas. 



