NO. IfiOr,. Ain-nREATHIXa VERTTIBRATFJ^—MOODIE. 23 



Triassic of Arizona. The clavicles are triangular, with rounded 

 angles, and the hypothenuse occupies the interior border. 



Measurements of the peetaral yinlle. 



mm. 



Width across the entire girdle 17 



Length of interchiviele 15 



Width of interclavicle 10 



Length of clavicle 11 



Width of clavicle, niaximuni 6 



The specimen is Cat. No. 4539 of the U. S. National Museum 

 (Lacoe collection). 



TUDITANUS MINIMUS Moodie. 



Plate 8, fig. 2. 



A nearly complete skeleton (Cat. No. 4555 U.S.N.M.) forms the 

 basis of this species, which has already been described and an outline 

 of the skeleton published." A photograph of the specimen on which 

 the species is based is published herewith. The form is interesting 

 as showing an advanced type of endochondral formation of the limb 

 bones, and also in the complete preservation of the hand and foot. 



EOSERPETON TENUICORNE Cope. 



The new genus Eoserpetoii has been erected for the reception of 

 the species formerly described by Coj^e as Ceraterpeton, temiicorne. 

 The characters of the new genus are found in the skull, which is 

 represented by a nearly perfect specimen belonging to Columbia 

 University. The skull was excellently supplemented by a nearly 

 complete skeleton in the collection of the U. S. National Museum 

 (Cat. Nos. 4472, 4473, U.S.N.M.), which shows characters of the 

 skull which vary somewhat from the type. The horns are more 

 slender in the National Museum specimen, and are more curved, and 

 the form of the skull varies slightly in the two specimens. A restora- 

 tion of the form has been attempted.'' Since the specimen has already 

 been described by Cope a redescription will be reserved. 



SAURERPETON LATITHORAX Cope. 



Plate 9. 



The new genus Saurerpeton has been proposed " for the reception 

 of the species described by Cope as Sauropleura latithorax. The 

 characters on which the new genus was based were the broad ventral 

 elements of the abdomen and the arrangement and form of the cranial 



"Moodie, Journ. Geo!., vol. 17, 1909, p. 50, fig. 10. 

 '' Idem, p. 77. 

 ^Idem, p. SO. 



