xu 



MEMOIRS OF THE CARNEGIE MUSEUM. 



Odontostilbe pulchra (Gill). 



Cheirodon insignis Steindachner. 



Odontostilbe paraguayensis Eigenmann & Kennedy. 



Cheirodon pisciculus Girard. 



Cheirodon piaba Liitken. 



Carapace of Baena arenosa Leidy. 



Plastron of Baena platyplastra Gilmore. 



Carapace of Baena inflata Gilmore. 



Plastron of Do. 



Carapace of Baena gigantea Gilmoie. 



Plastron of Do. 



Carapace of Echmatcmys callopyge Hay. 



Plastron of Do. 



Carapace of Echmatemys douglassi Gilmore. 



Plastron of Do. 



Carapace of Echmatemys hollandi Gilmore. 



Carapace of Echmatejrnjs depressa Gilmore. 



Carapace of Echmatcmys obscura Gilmore. 



Plastron of Do. 



Plastron of Hadrianus corsoni (Leidy) 



Plastron of Hadrianus robustus Gilmore. 



Plastron of Hadrianus utahensis Gilmore. 



Carapace of Amy da scxdumantiquum (Cope) 



Carapace of Testudo uintensis Gilmore. 



Plastron of Do. 



Atractus toeniatus Griffin. 



Dorsal view of head of Do. 



Ventral view of head of Do. 



Tropidodipsas spilogaster Griffin. 



Dorsal view of head of Do. 



Ventral view of head of Do. 



Clelia euprepia Griffin. 



Dorsal view of head of Do. 



Ventral view of head of Do. 



Elaps hollandi Griffin. 



Dorsal view of head of Do. 



Ventral view of head of Do. 



Pimelodella serrata Eigenmann. 



Pimelodella cristata (Miiller & Troschel). 



Pimelodella avanhandavce Eigenmann. 



