Abstract
Descr. the first mammal of this age in America, ASTROCONODON (p. 32, in Triconodontidae, Triconodontinae) denisoni, based on lower jaws. Tongue and groove development of the molars is more advanced than in Jurassic forms. An associated bumerus is descr., but cannot be assigned definitely to this, or another, sp.

This publication has 2 references indexed in Scilit: