26 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.3?. 



the specimen pertained to that species. Closer examination of the 

 vertebrae and ribs, however, revealed typical diceratosaurian charac- 

 ters. The femur is very long and quite stout, with the shaft long and 

 the extremities expanded. The dimensions of the tibia are not defi- 

 nitely ascertained, but it has a structure essentially similar to the 

 femur, with slender shaft and expanded ends. 



The relationship of Diceratosaurus to Ceraterpeton galvani Huxley 

 is a close one. The peculiar form of the scapula, the number of the 

 dorsal vertebrae, the regular arrangement of the pectoral elements, 

 the length of the tail, the form of the vertebrae and ribs in the two 

 forms are indicative of a close relationship. The two genera both find 

 a place in the family Urocordylidce^ as defined by Lydekker." The 

 generic character which separates the two forms in the position of 

 the horn, which in Ceraterpeton is epiotic, and in Diceratosaurus 

 supra temporal. 



Measurements of Diceratosaurus punctoUneatus Cope. 



mm. 



Length of specimen 94 



Length of rib 9 



Width of rib 1.5 



Length of vertebrifi 5 



Width of vei'tebrne 4. .5 



Length of femur 27 



Proximal width of femur 6 



Median width of femur 3 



Distal width of femur 7 



Length of tibia(?) IS 



Distal width of tibia 4 



Median width of tibia 2 



Length of ilium 12 



Proximal width of ilium 7 



Median width of ilium 3 



Distal width of ilium 6 



Scutes of AMPHIBIAN, SAUROPLEURA SCUTELLATA Newberry. 



Associated with certain specimens of the above-mentioned species 

 are sometimes found peculiar scute-like elements (Cat. No. 4513, 

 U.S.N.M.) which have been regarded as pertaining to the Amphibia 

 and possibly to some species of Sauropleura itself. The position of 

 the scutes on the body is uncertain. They range in size from 5 or 6 

 mm. to 30 mm. in length. They are always somewhat fan-shaped, 

 with one end abruptly acute. 



" Lydekker, Cat. Fos. Kept, and Amphibia Brit Mus., pt. 4, p. 196. 



