257 lyiGNiTic Stage 65 



Corbicula cornelliana n. sp. PI. 13, fig. 3. 



We have only a fragment of this interesting form, and, were 

 it not of universal interest we would pass it by unnoticed, un- 

 named. But the discovery of this genus or one very closely 

 allied to it, as indicated by the long, curved anterior lateral 

 tooth and three cardinals, a brackish water type, in the upper 

 Lignitic, seems worthy of special remark. External striation 

 about the umbo indicates that the shell when entire is more or 

 less triangular in outline with angles very obtusely rounded, 

 and sides curving, especially the base. It is quite gibbous. 

 The right valve here figured show the long groove or socket 

 for the anterior lateral of the left valve. A cavity below and 

 behind the umbo is formed, as in Dosinia, by the decaying of 

 soft shelly matter. 



Locality. — Alabama: Hatchetigbee Bluff. 



Specimen figured. — Paleontological Museum, Cornell Uni- 

 versity . 

 Psammobia ozarkana n. sp. PI. 12, fig. 14; pi. 13, fig- 8. 



Specific charanization. — General form of the shell as figured ; 

 when young, anterior slightly longer than posterior, narrowing 

 rapidly towards anterio-basal margin, posterior broadening, 

 slightly truncated on the posterior-dorsal margin ; surface irreg- 

 ularly striate concentrically, slightly depressed from beak to base, 

 with two or three obscure radiating folds extending from beak to 

 basal margin just anterior to the posterior-basal margin. 



Resembles P. eboi^a Con. somewhat, but has not the extended 

 posterior of that species, the general form of the shell is not so 

 elongate and the anterior cardinal tooth is not so large and well 

 developed. 



Locality. — Alabama : Ozark. 



Type. — Paleontological Museum, Cornell University. 



Sphaerella sp. ^ PI. 13, fig. 6. 



This specimen is very probably a varietal form of our 5. ante- 

 producta from Texas ( Proc. Acad. Nat. Sci., Phila., 1895, p. 50, 

 pi. 2, fig. 4), but since it is the only specimen in our coUecftion 

 from Hatchetigbee bluff, it seems best to postpone its identifica- 

 tion until more material is obtained. 



Diplodonta sp. PI. 13, fig. 7. 



