740 
S. W. WILLISTON 
of Carboniferous age; Araeoscelis from the Clear Fork, of Lower 
Permian age. 
Aside from the remarkable cuspidate and acrodont 
teeth, which are of more than generic importance, the structure of 
the skull in Bolosaurus striatus, as figured by Broom, separates the 
A, skull from 
Fic. 3.—Casea broilit. 
below; B, the same from behind; both 
¢ natural size: bs, basi sphenoid; eo, 
exoccipital; ds, dermosupraoccipital ?; 
po, paroccipital; pt, pterygoid; pa, pala- 
tine; g, quadrate; st, stapes. 
two genera into distinct orders. 
A matter of more importance 
than the synonymy of Ophi- 
odeirus, 1s the relationship of 
Kadaliosaurus Credner, from 
the Lower Permian of Germany. 
My attention to such possible 
relations was first called by a 
letter from Professor Jakolov 
written on the receipt of my 
paper containing the original 
description of Avaeoscelis. He 
mentioned the fact that he had 
certain bones from Europe which 
seemed to be identical with 
those figured by me. A study 
of Credner’s figures and de- 
scription of Kadaliosaurus con- 
firmed my belief of the affinity 
between the two genera, as I 
have already published. In 
showing our specimens to Dr. 
von Huene on his late visit to 
Chicago, I called his attention 
to these resemblances, in which 
he immediately concurred. Last 
April I had the privilege of 
studying the type specimens of Kadaliosaurus and Paleohatteria 
in Leipzig, for which my thanks are due to Professor Stille and Dr. 
Henkel. 
The material of Kadaliosaurus is imperfect, but, so far as 
it goes, I could not distinguish the genus from Araeoscelis, save by 
the greater size of the specimen and the presence of ventral ribs, 
both dubious characters. 
