AMERICAN LABYRINTHODONTIDM 569 



In 1899 Dr. Lester F. Ward collected, among other things, a 

 fragment of a Labyrinthodont cranial plate from the Trias of north- 

 eastern Arizona, near Tanners Crossing on the Little Colorado River. 

 The following year Mr. Barnum Brown obtained from the same 

 locality an interclavicle of a large Labyrinthodont which Mr. Lucas 

 described as Metoposaurus fraasi. 1 



In 1902 Mr. Newton H. Brown found various Labyrinthodont 

 bones in the Triassic deposits near Lander, Wyoming. He sent 

 some fragments of these to Mr. Lucas, of the National Museum, 

 and others to Professor Knight, of the University of Wyoming. 

 After the death of Professor Knight, the fragments sent to him were 

 forwarded to Professor Merriam, who recently sent them to the 

 University of Chicago. Among them was the back part of a mandible 

 belonging to one of the skulls described in this paper. Mr. Brown 

 very generously gave the benefit of his intimate acquaintance with 

 the Triassic deposits of the Lander region to a University of Chicago 

 party that collected there in 1904, and it has given the writer much 

 pleasure to name the type species of Anaschisma in his honor. 



In the fall of 1904 Mr. Reed, of the University of Wyoming, sent 

 to the University of Chicago, for examination, some vertebrae and 

 fragments of cranial bones of Labyrinthodonts obtained from the 

 Trias about forty miles south of Laramie, Wyoming. Dr. Williston, 

 in company with Mr. Reed, had visited this locality a few months 

 previously, and ascertained that their horizon is not far from the top 

 •of the Red Beds, and provisionally refers it to the Hallopus Beds 

 of Marsh. 



SPECIMENS OF LABYRINTHODONTIDM FROM THE LANDER 



REGION 



The material collected by the University of Chicago party of 

 1904 includes vertebras, fragments of skulls, breast-plates, ribs, and 

 limb bones. All of the vertebrae have the arches broken away. 

 There are more than forty in the collection, but no two are known 

 to belong to the same animal. The skull bones are fragmentary, 

 and the fragments are usually small, though one specimen includes 

 .the frontals, prefontals, and nasals. Fragments of breast-plates are 



1 Proceedings of the U. S. National Museum, Vol. XXVII, No. 1353, p. 194. 



