83 



than iiii\ (jIIk r \( r1il)i;i'. In siicli. Ilic (•ciilniiii is Ics-; ctJiiipressed I lnuiali 

 wifli concave sides, and witli a section rallirr ([luidratc. 



Tli(! coi-vicid vcit('l)rii', IVoiii Ilic sixty-sixtli to flic Inirty-niiitli, arc all 

 longer than the dorsals : thcv eoninicnce I'onr inches in Icnsith, increase 1o 

 five, and diminish (o tonr auain. 



^f^■allnrcmentll. 



Iix-lirs. l.illf. 



I.iiigtli i>tsixt.v-lliii.I i-iivical 4 !».■-' 



De]>lli oftlie articiiliir (ace of tbo ciMitniin :> (•. 



Wiiltli of tilt! articular face of the (U'lilniin •! 1". - 



Total elevation of the uinth cervical - '.'. 



Anterior posterior diameter of tbe third cervical '■i -• 



Transverse diameter of the tbiril cervical 2 11. 



Length of the head of rili 1 !'• ' 



Width of the head of rib 1 X 



Widthof the shaft of rib 1 It'.-'' 



Many of the r/hs jireserved have been pressed upon the vertebra- and 

 crushed. 



The first dorsal is that vertel)ra which first presents a distinct articula- 

 tion for a rib. The diapophyses are never much elevated above the cen- 

 trum, and are longest on the thirteeiitii (inserting seven supposed to be lost). 

 Their form is stout and much depressed, and distally expanded. They dimin- 

 ish gradually, and, on the third, are represented by a longitudinal angulation; 

 the superior angle is first distinct on the first, and bounds the articular sur- 

 tiice last on the third. They give the transver.se section of" the posterior eer- 

 vicals a pentagonal form; that of the anterior dorsals is nearly circular. The 

 latter are strongly constricted medially, and the articular faces are slightly 

 concave. The external surfiice near the included angle is coansely ridged, in 

 conformity with coarse cellular texture of the spongy bone. The venous 

 foramina gradually become more widely separated, approaching each other 

 again on the posterior cervicals. On the dorsals, they occupy the bottom of a 

 more or less pronounced concavity. These concavities, on the posterior dor- 

 sals, are bounded externally by a strong obtuse longitudinal angulation, giving 

 a fpiadrate outline to the section of the centrum in this part of the series. 



The posterior cervicals are not readily distinguished from the anterior 

 doisals. In the latter, the ril)s appear to be present, of reduced length, judg- 

 ing from the smaller size of the remaining licads. The artieidar pits continue 

 to descend till their lower marginal ridge is.*he inferior lateral angle of tiie 

 vertebra. On such vcrlebrar^, the inferior surface is flat. 



