Plate 16 



FAMILY TRIONYCHIDM 



SPINY SOFT-SHELLED TURTLE Trlomjx spinfer. 



Distribution : Ohio and Mississippi Valley. 



Length of fully grown shell, 12 inches. 



SOUTHERN SOFT-SHELLED TURTLE Trion/ju^ fero^ 



Distribution: Southwestern United States. 



Length of fully grown shell, 1 8 inches. 



