Materials and Methods During the course of this study I have examined 247 frogs that I assign to the genus Ptychohyla, plus 40 lots of tadpoles and 12 skeletal preparations.
"A Review of the Middle American Tree Frogs of the Genus Ptychohyla"
William E. Duellman
The suggestion that the skeletal material found in the fissures is the remnant of the prey of other animals is questionable because of: 1. The absence of tooth marks on the fossils.
"Two New Pelycosaurs from the Lower Permian of Oklahoma"
Richard C. Fox
The general build of an individual, his skeletal type, the proportion between the size of his arms and that of his legs, as well as that between his trunk and his lower extremities, whether he is to be tall, lanky and loutish, or short, squat and dumpy, are to be considered.
"The Glands Regulating Personality"
Louis Berman, M.D.