122 



POST-PLEIOCENE FOSSILS. 



characters of these teeth. In form they are elongated conical, compressed laterally and 

 curved backward; with the anterior border trenchant, and with the apex barbed posteriorly. 



Plate XXV. Fig. 2, Skull of recent Rihhon fish ; the two large barbed teeth shaded, 

 indicate the fossils from Simmons'. 



Museum, College of Charleston. 



Genus, ALLIGATOR. — Cu v. 



ALLIGATOR M I SSISSIPIEN SI S. 



Plate XXVII. Figs. 6, 7. 



Remains, consisting usually of much mutilated teeth or fragments, referable to the 

 Alligator, are frequently found among the Post-Pleiocene fossils of the Ashley river. Fig. 

 7, Plate XXVII represents two specimens of teeth from this locality. 



Plate XXVII. Fig. 6, Right side lower jaw of the Alligator, reduced to onefifth 



natural size. 



" 7, Two teeth fossil from Ashleij beds. 



Museum, College of Charleston. 



CHELONIA. 

 Genus, TESTUDO.— Brongniart. 



Plate XXVIII. Figs. 1-4. 



Remains of several species of Turtles are found in the Post-Pleiocene deposit of the 

 Ashley river. In Plate XXVIII, figure 1, the vertebral extremity of a costal plate of a 

 huge species is represented. The specimen measures at its widest part six inches, from 

 which position it narrows outwardly. In thickness the specimen measures an inch and a 

 quarter. 



The remaining figures of the same plate exhibit the fragment of a costal plate and two 

 marginal plates of a smaller, and perhaps a different species of Turtle from the former. 



