species, in eastern Mexico, chiefly in the area of Volc.in San Martin of southern Veracruz. The actual length of time available at the latter site was but two days, but even this brief stay verified the zoogeographic significance of the region previously suggested by announcement of the extraordinary and unique toad Bufo cavifrons Firschein (1950). One new salamander was secured there, a snake new to Mexico (Tantilla schistosa), a series of Scincella requiring allocation of caudaequinae as a subspecies of S. silvicolum, and a number of rarities and useful locality records in addition to a second example of Bufo carifrons. Specimens secured en route to and from the volcano include a series of tadpoles presumably representing Hyla miolympanum (not heretofore described), and records of Storeria dekayi temporalineata from the states of San Luis Potosi and Tamaulipas.
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Darling et al. (1954) studied this question.
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