2o6 Bulletin 31 206 



PLATE 5 

 Figure Page 



1. Ostrea alabamiensisvds. frionisYLox., X % 9 



San Miguel Cr., S. E. corner of Frio Co., Tex., below De Viller's 

 ranch. Texas State Museum, No. 1710. 



2. O. a/abaiiiiensis Lea X Yz ; form caW^d gt'ori^i ana. Shell Bluff, Ga., 

 C. U. Mus. No. 34,048. While young showing characteristics of al- 

 abaniiensis with frionis-WV^ plications, and when adult having 

 typical rc7;//'rat"/rt-like umbones ; sKx^oi georgiana. Jackson Eocene. 



3. O. alabamiensis var. X i ; young and thin with traces of plica- 

 tions ; Burleson Shell Bluff of Penrose's report, Brazos River ; one 

 mile below Milam-Burleson Co. line. Texas State Museum, No. 55 



