8 NORTH AMERICAN BATRACHIA AND KEPTILIA. 



c. Teeth on roof of mouth consisting of two longitudinal 

 rows (palatine), whicli approach in front and diverge 

 at back of mouth; usually with a row of large red spots 

 on the sides PLeurodeli-dce. 



Family AMPIilUMIDvE. 



Toes two on each foot Amphiumq. 



Toes three on each foot Kurcenopais. 



Genus Amphiuma, Linn. 



5. A. means^ Linn. Congo Snake. Color above brownish 

 to slate color; beneath paler; one and one-half feet long. From 

 Mississippi to l^orth Carolina. 



Genus MuR.ii:Norsis, Fitz. 



6. M. tridactylus^ Cuvier. Color above brown to dark 

 gray; beneath paler. Mississippi to Louisiana. 



Family MEXOPOMID^E. 

 Genus Menopoma, Harl. 



Palatine and maxillary teeth almost parallel; tongue trans- 

 versely oval; limbs short and thick; toes 4-5, the two outer 

 with membranous fringes; gill-clefts present. 



7. M. allegheniense^ Harl. Hell-bender. Body cinerous, 

 with dusky blotches; length, one and one-half to two feet. Trib- 

 utaries of Mississippi, and streams of Louisianian district to 

 North Carolina. 



8. M. fascum^ Holbrook. Body uniform umber; pale 

 beneath. Headwaters of Tennessee river. 



Family AMBLYSTOMID.E. 

 Genus Amblystoma, Tschudi. 



Palatine series of teeth in the same line, though often inter- 

 rupted; quadrato-jugal bone wanting; tongue large and thick, 

 with a narrow tree margin, except posteriorly. A series of 

 mucous pores around and anterior to orbit. Digits 4-5, not 

 webbed. 



A. Palatine series of teeth extending laterally behind internal 

 nares; plicae of tongue radiating from its posterior portion. Par- 



