BATHYGNATHUS BOREALIS, Leidy.

Leidy, Journ. Ac. Nat. Sci., Pliila., 1854, p. 827, Tab. xxxiii.

Known only from a portion of mandibular ramus with teeth. Probably one of the types whose tracks are preserved in the red sandstones of the Connecticut Valley. Though placed among the Thecodonts by Owen, I greatly suspect that its true place is here. Triassic red sandstone of Prince Edward’s Island, New Brunswick.