16 The Ottawa Naturalist. [April 



Another large form of carnivorous dinosaur, having support- 

 ing alveolar plates on the inner sides of the jaws, occurs in the 

 Belly River formation of Alberta and is represented in the 

 collection of 1913. 



Measurements. 



Feet. Inches. 



Total length of specimen (estimated) 29 2 



Skull, length to occipital condyle (approx) 3 2 



depth to lower border of maxilla, through 



middle of antorbital opening 1 



" depth to lower border of dentary, through 



middle of same opening. 1 9f 



Mandible, length of 3 2| 



Third premaxillary tooth. 



Length below alveolar margin 2 



Breadth at midlength Of 



First maxillary tooth, 



Length below alveolar margin If 



Breadth at midlength Of 



Second maxillary tooth. 



Length below alveolar margin 2h 



Fore and aft diameter Of 



Transverse diameter Of 



Maxillary tdoth, longest (6th), length below 



alveolar margin 31 



Dentary tooth, longest (5th), length above alveolar 



margin , 2f 



Cervical vertebrae (atlas, axis, 7 cervicals and 2 



cervico-dorsals), estimated length 4 4 



Dorsal vertebrae with sacrum (11 dorsal, 5 sacral). 7 6 



Caudal vertebrae, 1st to 22nd, both inclusive 10 4 



23rd to 34th, both inclusive 



(estimated) 3 10 



Scapula with coracoid, length 3 5 



Humerus, length 12| 



Ulna, length 6| 



Radius, length 6^ 



Ilium, length (antero-posterior) 3 3^ 



Ilium, height above lower end of ischial peduncle. . 1 2 



Ischium, length 2 _ 8| 



Pubis, length 3 3J 



Pubis, fore and aft length of foot of 1 10 



Femur, length 3 4J 



Tibia (including astragalus), length 3 4 



