JUEASSIC 7ERTEBEATE FOSSILS. 



4U7 



The head in this genus was very small. The skull resembles some- 

 what that of Brontosaurus, but the jaws arc more massive and the teeth 

 larger^ The vertebra' were similar in general form to those of Brontosaurus, 

 but were less lightened by cavities, especially in the trunk. The sacrum 

 was much less excavated, and the caudals were all solid. 



Fig. 49.— Fourth cervical vertebra of Moron 

 Fig. 50.— The same vertebra ; back view. 

 Both figures are one-eighth natural size, 

 b, ball, <■. cup; ■/. diapophysis ; /, toraznen 

 zygapophysis. 



(jramlis Marsh ; side view. 



< mi urn ; p, parapopbj sis ; 



vgapophye 



Fig. 51. Pelvic arcb of Moroaaurus ara/ndis; scon from in front. One-sixteenth natural size. 



u first sacral vertebra; I), sacral rib, or transverse processof lust sacra] vertebra; c, thesame | I 



eacral vertebra] e, same processof hist sacral vertebra >'. ilium is, ischium; ne t neural canal: p, fourth, or last, sacral 

 vertebra; pft, pubis. 



The scapula has a Large anterior projection on its shaft, while the 

 ischia are twisted and were directed backward, characters not seen in the 

 Atlantosauridse. 



A cervical vertebra of this genus is shown in figs. 49 and 50, above, 

 ami in fig. 51 the entire pelvic arch, with the sacrum in position, is 

 likewise represented. 



MON XXVII- 



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