240 • • S. W. WILLISTON. 



acter adds another evidence of the relationship between the 

 Procolophonia and Labidosanrus, and destroys its value as a 

 group distinction. 



Addenda. — Texas Permian Fields, September 25. Since the 

 manuscript of the foregoing left my hands I have seen the recent 

 paper by Case (Bull. Amer. Mus. Nat. Hist., xxiv, 531, June 30, 

 1908), in which he recognizes the amphibian nature of Lysorophus, 

 figuring the skull with its exposed palate. He does not, how- 

 ever, discuss the relationship of the form and we differ in the in- 

 terpretation of some of the bones. 



Within the past week Mr. Miller, my assistant, has discovered 

 two deposits of the species herein described from which cart- 

 loads of the peculiar nodules might be had for the digging. In 

 two other places I have found them less abundantly. In ex- 

 amining the selected material, I have detected a small limb, very 

 Ncchinis-WkQ with four metapodials and epipodials in place, the 

 mesopodials evidently unossified. It is of course possible, but 

 not probable, that the limb is an accidental intrusion of some 

 other small amphibian. My conviction is that the Lysorophidae 

 should be included in the Ichthyoidea. 



