736 STUDIES FOR STUDENTS 
Baur, G., On the Phylogenetic Arrangement of the Sauropsida. Journal of 
Morphology, September 1887 (contains a discussion of the phylogeny of the Rep- 
tilia). 
WILLISTON, S. W., Part IV, The University Geological Survey of Kansas, 1898 
(contains a very full description of the Pythonomorpha and/some of the Cretaceous 
Turtles, with many good illustrations). 
