496 



Annals of the Carnegie Museum. 



about the same throughout its length, but antero-posteriorly it is ex- 

 panded more especially at the proximal end. The internal side of this 

 end presents a triangular slightly concave rugose surface for attachment 

 to the tibia. The antero-superior border is produced into a thin edge 

 which fitted against the cnemial crest of the tibia. On the upper ex- 

 ternal half of the shaft is a slight rugosity which probably served as a 

 muscular attachment. The lower extremity of the fibula is suboval in 

 form and extended distally for articulation with the astragulus. 



Measurements. 



Greatest length of the fibula, 243 mm. 9^ inches. 



Greatest breadth proximal end, ^6 " 2^^ " 



Greatest breadth of distal end, 43 " I^ " 



Axial Skeleton. 

 T//e Cervicals. — The greater portion of an arch of one of the ante- 

 rior cervicals is all that is preserved of the cervical series. In a general 

 way it resembles the cervical arch of the larger members of this group. 

 The arch was united to the centrum by a well-defined suture. The spine 

 is low and robust, nearly square in cross-section and placed well back. 



The articulating surfaces of the posterior 

 zygapophyses are expanded. Superiorly 

 they are supported by the postzygapophy - 

 sial " laminse which descend from the ad- 

 jacent po.sterior corner of the spine. 

 These laminje are strong superiorly but 

 Fig. 7. Anterior cervical of inferiorly form the rather frail posterior 

 Elosaiirus paj-vus. Seen from 

 the right side (No. 566), yi nat- 

 ural size, s., spine; A, trans- 

 verse process, or diapophysis ; 

 a.z., anterior zygapophysis ; /.-., 

 posterior zygapophysis ; azL , pre- 

 zygapophysial lamina ; pzL , post- 

 zygaphysial lamina ; kl., horizon- 

 tal lamina; /^/(T., postdiapophysial 

 cavity; sti., suture to centrum. 



wall of the neural canal. There is a deep 

 postzygapophysial cavity.^ The prezyga- 

 pophysial laminae are very weak superior- 

 ly but more robust inferiorly, just the 

 reverse of the postzygapophysial lamim^. 

 The horizontal laminre descend obli- 

 quely from the post- and prezygapophyses 

 meeting in the diapophy.ses. The dia- 

 pophysis or transverse process is low on 

 the arch and extends downward, forward and outward, terminat- 



'' We have used nomenclature for lamince proposed by Dr. H. F. Osborn, see 

 Memoir of Am. Museum of Natural History, Vol. I, part V, p. 193. 



^Nomenclature for cavities was proposed by Mr. J. B. Hatcher, Memoir Carnegie 

 Museum, Vol. I, No. i, July, 1901, p. 17. 



