380 W. G. Knight— Jurassic Vertebrates from Wyoming. 



Radiale,— Width - 



Length. __ 



Thickness 



First distal carpal,— Width . . 



Length . 



Thickness 



Second distal carpal, — Width 



Length 



Thickness 



Third distal carpal, — Width - 



Length 



Thickness 



•135 m 



•085 



•088 



•lll m 



•078 



•067 



•140 m 



•100 



•067 



•100 m 



•100 



•058 



First row of basal phalanges. 



Length 87 



Proximal width 52 



Distal width 52 



Width through shaft.. 32 



No. I. 



mm 



No. II. 

 102 mm 



70 



60 



37 



No. III. 



106 mrn 

 68 



65 



35 



A cervical vertebra centrum, — Width 



Length 



Height 



A drosal vertebra centrum, — Width . 



Length 



Height 



A caudal vertebra centrum, — Width 



Length 



Height 



No. IV. 



106 mm 



62 

 50 

 31 



•080 m 



•065 



•078 



•152 ra 



•111 



•150 



•103 m 



•077 



•065 



V. 



No, 

 106 mm 

 42 

 40 

 25 



The remains of this species were found in Natrona County, 

 by the writer. The geological position is the uppermost band 

 of the marine beds of the Jurassic. I would suggest that 

 hereafter these marine beds be known as the Como group. I 

 take this opportunity to thank Dr. Baur and Dr. Williston for 

 many suggestions in connection with this paper. 



University of Wyoming, March 28th, 1898. 



EXPLANATION OF FIGURES. 



Fig. 1.— Front limb of Hegalneusaurus rex. x^. H, humerus; R, radius; U, 

 ulna; r. radiale; i, intermedium ; u, uinare; 1, 2, 3, distal row of carpals. 

 Fig 2. — Side view of humerus, showing the development of the head, x ■$. 

 Fig. 3. — Cross-section of the head of the humerus, x f . 



