PLATE XXX. 



Jurassic Dinosaurs. — Sauropoda. 



MoHOSAURIDJS. 



Tags. 

 Fig. 1. Skull of Morosaurus agilis Marsh; posterior view; one-half natural size. 181 

 a, postoccipital bone; b, lateral plate of atlas; e, odontoid process, or cen 

 tniiii, of same; eo, exoccipital; i, inferior portion of atlas; «, neural 

 canal: p, parietal; po, postorbital; 8, squatuosal; so, supraoooipital. 

 Fig. 2. Portion of skull, with brain east, of Morosaurns grandis Marsh ; top 



view ; one-fourth natural size 181 



c, cerebral hemispheres; cb, cerebellum; ,/jj, postfrontal; /)■, frontal; ol, 

 olfactory lobe; on, optic nerve; op, optic lobe; p, paroecipital process; 

 pr, parietal ; q, quadrate; s, squamosal. 

 Fig. 3. Left dentary bone of Morosaurns grandis : outer view ; one-third natural 



size 181 



a, edentulous margin; s, symphysis; sr, lace for surangular. 

 304 



