394 Williston — New Family of Reptiles from the 



Three years ago I expressed the opinion that the phalangeal 

 formula 2, 3, 4, 5, 3(4) was the primitive one for land reptiles, 

 if not for land vertebrates, as observed in Eosauravus eopei. 

 Broom is of the opinion that this is the formula in Propappus 

 and he has proven it to be that of Proeolophon. Dromopus 

 agilis Marsh, as figured by the author and Matthew, shows a 



Fig. 6. 



Fig. 6. Limnoscelis pahidis. Pelvis, from below, two-fifths natural size. 

 a, cross-section through pubes at a; b, cross-section through ischia at b. 



similar phalangeal formula. These footprints are from near 

 the upper part of the Coal measures in the vicinity of Osage, 

 Kansas. Marsh thought that they were made by a lacertilian 

 rather than an amphibian, a natural error considering the 

 lacertilian form of the prints. They probably come from 

 some microsaurian reptile not unlike Eosauravus copei. 

 , Pelvic Girdle and Extremity. — The pelvic girdle lies in 

 natural articulation, with but little disturbance; the right 

 pubis is a trifle compressed, and the extremity of the left 



