XIII. 



STENEOSAURUS. 



381 



Diagram CLXXXII. Head of Steneosaurus palpebrosus. Scale one-tenth of nature. 



I. Under side of the head in the Oxford Museum, shewing the rows of teeth 

 (twenty-seven traceable on one side), the posterior nares, and the lower surface of 

 the frontal and other bones of the head, in relation to the occipital foramen and tubercle 

 and articulating termination of the os quadratum. 2. The upper surface, in which 

 the large temporal lacunae, separated by a narrow ridge ; the frontal bone covering 

 by its lateral extension the orbit, so that the eyes looked out horizontally ; before it 

 the two short praeorbital canals ; the maxillary bones, and the external nasal opening 

 pierced in the intermaxillaries, are all apparent. 



Diagram CLXXXIII. Steneosaurus palpebrosus. Scale one-tenth of nature. 



i. Lower jaw, seen above. The anterior part is broken off. 2. The lower jaw, 

 seen sideways, to mark the coronoid process and the projections of the articular bone. 

 The lines below indicate the elements of the bone, but they are obscure. 



