possibly stocki is ancestral to rotundus.

The species is named in honor of the late Professor Chester Stock, under whose direction the fossil materials from San Josecito Cave were obtained, and who, at the time of his death, was studying the mammalian fauna from the cave.

Eptesicus cf. grandis (Brown)

Remarks.—This specimen is referred provisionally to E. grandis. The dentition is larger and heavier, and the ridges and depressions on the dorsal surface of the rostrum are more pronounced than in Recent E. fuscus. The P4-M3 length is 6.1 (approximately 6.1 in the holotype of grandis, less in fuscus); least interorbital constriction, 4.2 (4.3 in the holotype of grandis, more in fuscus); breadth of rostrum between infraorbital canals, 6.4; breadth across P4, 7.3.

Table 1.—Cranial measurements of two species of Desmodus.