NOTES AND LITERATURE 



tenmospondylolis groups and the holospond.v 

 the first group he would place all the fori 

 rhachitomous, emboloinerons ami stereuspomh 1 

 in the second group the forms which are 

 Aistopoda and .M icrosanria. He evidently oxd- 

 sauria from the Stegocephala proper, in which 



The Cotylosauria. — The anatomy of this p- 

 reptiles has been further elucidated by the 

 Williston 1 and Broili. 2 Williston restudied ' 

 scribed by Cope under the name of h,n„lu 

 University of Chicago possesses a nearly coi 

 this form and from his studies of this specimen 

 the conclusion that the form belongs rath' 

 Labidosaurus and is a typical cotylosaurian. 

 detailed figures of the anatomy of the varior 

 skeleton and a restoration of the form in so ff 

 Broili has also given a restoration of a species 

 L. hamatus. He has mounted the entire sk" 1 

 was impossible in the case of the specimen stuc 

 Broili 's restoration is a welcome addition to 

 the Cotylosauria, although I am sure the anir 

 would prefer not to have such an awkward swf 

 column. One of the peculiar things about 

 is the absence of lateral line canals which i 

 to be present from the close resemblance in 

 to the Stereospondyli, in which these canals a 

 Dr. Williston searched carefully for the ca 

 success. The presence or absence of the car 

 future time, be one of the chief distinguish' 

 tween the forms which we call reptilian a 

 amphibian. 



As a postscript to his article on Lysor 

 figured and described the ventral ribs of Labii 



1 Journ. Geol., Vol. XVI, No. 2, 1908. 



2 Zeit. Deutsch. geol. Gesell., Bd. 60, H. 1, 1908. 

 * Biol. Bull., Vol. XV, No. 5, 1908. 



