404 PROCEEDINGS OF THE ACADEMY OF [1890. 



Spondylus sp. ? 



* Ostrea Alabamensis, Lea. Contr., p. 91. 



Ostrea lingua-canis, Lea. — Contr., p. 92. 

 0. pincerna, Lea. — Contr., p. 92. 

 0. semilunata, Lea. — Contr., p. 90. 



Near Alto ; Burleson Shell B. ; St. Augustine Co. ; Station 5 ; 

 Station 1, below Carrizo ; Smithville. 



« 0. sellaeformis, Conr. F. F. T., 1st ed., p. 27. 



Ostrea radians, Conr. — F. S. T., 1st ed., p. 27. 

 Smithville ; Cherokee Co. ; St. Augustine Co. 



* 0, divaricata, Lea, Contr., p. 91. 



f Ostrea jiabellula, Lamarck. 

 St. Augustine Co. 



Anomia epMppioides, Gabb. Jour. Acad. Nat. Sci. Phila., 2d ser., IV, p. 388. 



Station 2 ; McBee's ; near Jacksonville ; near Alto. 



Natica Dumblei, n. sp. Plate XI, fig. 3. 



Shell globular, smooth ; whorls about five, moderately convex, 

 and flattened slightly on the shoulder ; suture impressed ; aperture 

 about two-thirds the length of shell ; coluraellar surface flattened ;. 

 umbilicus probably wanting. 



Length (height), 2'3 inches ; greatest width, about the same. 



Station 2, Rio Grande ; one specimen, filled with matrix. 



This species seems closely allied to Natica crassatina, Lamarck, 

 from the Paris Basin, and may prove to be that form. It is the 

 largest of our Eocene Natlcas ; named after the State Geologist of 

 Texas. 



CeritMum Texanum, n. sp. PI. XI, fig. 2. 



Shell turreted, of the type of the well-known Cerithium gigan- 

 teum and C. Parinense of the Paris Basin, but more rapidly tapering ; 

 whorls? in number, smooth, moderately convex, and ornamented 

 with obtuse, widely placed, and slightly diagonal ribs, which com- 

 pletely traverse the whorls ; aperture ? 



Station 5, Rio Grande. Two fragments, lacking both apex and 

 aperture, and measuring about one and a half inches in height. 

 Although thus imperfect, I have thought best to describe the form, 

 as it represents a well- recognized type from the European Eocene 

 deposits which has not heretofore been generally recognized as oc- 

 curring in the United States. The species is most nearly related to 

 Ceritkmm Parisiense, of Deshayes, from which it differs in the rap- 

 idly-tapering spire. 



