@article {270,
	title = {A contribution to the herpetology of MexicoProceedings of the American Philosophical Society},
	volume = {22},
	number = {120},
	year = {1885},
	pages = {379-404},
	publisher = {JSTOR},
	author = {Cope, E D}
}
@article {271,
	title = {Eleventh contribution to the herpetology of tropical AmericaProc. Amer. Philos. Soc.},
	volume = {18},
	number = {104},
	year = {1879},
	pages = {261-277},
	author = {Cope, E D}
}
@article {272,
	title = {A New Genus of Cystignathidae from Texas},
	journal = {American Naturalist},
	volume = {12},
	number = {4},
	year = {1878},
	month = {04/1878},
	pages = {252-253},
	author = {Cope, E D}
}
@article {273,
	title = {Tenth contribution to the herpetology of tropical America},
	journal = {Proceedings of the American Philosophical Society},
	volume = {17},
	number = {100},
	year = {1877},
	pages = {85-98},
	publisher = {JSTOR},
	author = {Cope, E D}
}
