117 



a median crest po^ti-riorl}'. Two aulero-supcrior ijrojcctioiis ol' the sii|)ra- 

 occipital embrace the parietal on each side below fhe crest; wliilc il is over- Ij 

 lapped, just below, by Ihe anterior extremity ol' the pioiitie. l^his does not \^ 

 extend solar lorward as tiie siipraoccipital. In I'ront ol", and below, this 

 point, the parietal is deeurved, and tbrms a considerable part of the lateral 

 wall of the cranium, tliongii with but moderate antero-posterior extent. 

 The lateral wall extends to the body of the sphenoid, where extensive sutural 

 surface has received if. I can find no suture crossinsi; it; and it is ap|)arently 

 all alisphenoid or all parietal. A [)art of the parietal is, however, undoubt- 

 edly deeurved in front of the alis[»henoid. The structure is quite as croco- 

 dilian as ophidian in this point. 



The postero-lateral angles of the parietal s(;nd the parieto-quadrate 

 arches to the o[)isthotie. which sends an ascending process to meet tho 

 parietal, as in lizards. It dill'ers from most of tlies*; in the j)resence of an 

 intermediate i>one, which has been observed l)y Mar.-.ii, and which \\iiuld 

 a[)pear to Ije a dismemljerment of one of those with which it is in contact. 



TIh! anterior ala of the prootk overlaps the alisphenoid largely. Its 

 posterior lamina may, or may not, meet the expansion of the exoccipital on 

 I he upper face of the sus|)ensoriuni. Interiorly, it is in contact with the 

 outer and posterior base of the sphenoid. 



The supiaoccipltdl is roof-shaped. The posterior extremity of fhe parietal 

 rests npou it, sending lateral aniies to tlui opisthotic, as in most Lacerlilla. 



The exoccipital is distinct, and bears a very small segment ot" tiie 

 occipital condyle. 



The opislhotic stands obliqnely upward and t<)rward, and furnishes a 

 glenoid cavity for the articulation of the (piadratum. It lias a process, directed 

 upward and forward, which occupies a concavity on the inner fiice of the 

 .squamosal, which has the same direction. 



The squamosal is a subrhondjic bone in a vertical plane, and is flat 

 below, and proximally presents a longitudinal external angle; disfally, it is 

 slender and [)rolong(!(i, and receives the posterior process of the post-frontal. 



The hasioccipital presents a strong transverse condyle. It is a mnssivc 

 bone, and presents infero-laterally two ])owerful processes, which diverge pos- 

 teriorly, and present l)road, rugose, ovate tiu'cs of insertion. There is an 

 obtuse keel on the middle line l)elow, which bifiircatcs posli'riorly to eacli 





