164 GEOLOGY AND PALiEONTOLOGY. 



APPENDIX. 



CRETACEOUS FOSSILS. 



CARDITA SUETETRICA. 



Plate XXI, Figure 5. 



Sub-orbicular, slightly ventricose ; ribs 22? not very prominent, rounded, squamose, ribs and 

 interstices about equal in width. 

 This may be an eocene species ; I do not know any of its associated fossils. 

 Locality. — Rio Bravo del Norte. 



PHOLADOMYA SANCTl-SAB^. 

 Plate XXI, Figure 4. 



Cardium Sancti-Sabce, Rcemer, Kreide. von Texas, p. 48, pi. VI, fig. 7. 



Inequilateral, longitudinally ovate, gibbous, posteriorly compressed, produced, sub-caudate, 

 smooth ; the rest of the shell radiate-costate ; ribs 16, equal, granulated, becoming obsolete 

 posteriorly ; umbo large, prominent, anterior to the middle. 



Localities. — Leon Springs ; New Braunfels, Texas. 



CAPSA, Lam. 

 CAPSA TEXANA. 



Platb XXI, Figure 6. 



Oblong-oval, disk flattened or depressed in the middle ; radii distinct, close, rugose poste- 

 riorly, gradually becoming obsolete in the middle of the valve ; buccal end regularly rounded ; 

 anal end truncated, direct. 



Locality. — Leon Springs. 



TEREBRATULA LEONENSIS. 



Plate XXI, Figure 2. 



Inequivalved, oval or sub-petagonal ; rostral end ventricose, rounded in the middle, and the 

 sides obliquely convex-depressed ; umbo small ; foramen small, almost touching the umbo ; 

 imperforate valve less convex ; valve widest above the middle, rapidly tapering to the front, 

 which is slightly depressed; front margin narrow and truncated; surface elegantly and minutely 

 punctate. 



Narrower in front than T. Wacoensis, Rcemer. I cannot compare it with Shumard's figure 

 of T. Choctawensis, as that figure, in the Palteontology of Red river, like all the representations 

 of fossils in that work, (except Gryphcea Pitcheri,) is worthless for the purpose of identification. 

 The punctuated Burfoce is so common in the genus that it has no value in specific distinctions. 



Locality. — Leon Springs. 



