IXSECTIVOKA 



Outline when viewed from the side long wedge-shaped, rounded 

 oti' posteriori". Surface of skull smooth, except for a slight 

 sagittal crest, present in old individuals along course of parietal 

 suture, and a crest-like elevation extending ftirward and outward 

 from autero-external angle of interparietal along edge of slightly 

 intlated mastoid region, and terminating anteriorly in a slightly 

 jxiinted in'ojection. Brain-case with posterior mai'gin nearly semi- 

 circular to projecting points already mentioned, then abruptly 

 conical to back of interorbital region, its outline when viewed 

 from behind fusiform, a little less than half as deep as wide : 

 condyles slightlv projecting, but not noticeably breaking general 

 posterior outline. Interparietal large, strap-shaped, slightly 

 convex in front, similarly concave behind, the lateral extremities 



squarely truncate, its antero-pos- 

 terior diameter about one-third 

 transverse diameter. Its anterior 

 and lateral sutures remain visible, 

 but the lambdoid suture is nearly 

 obliterated early in life, though 

 its position is usually marked by 

 a slight ridge representing the 

 lamlxloid crest. Base of brain- 

 ca.se smooth, without conspicuous 

 ridges, furrows or open spaces, 

 the bones for the most part some- 

 what inHated : two ill-tielined pits 

 in surface of basioccipital in front 

 of foramen magnmu ; a shallow, 

 broadlv triangular median furrow 

 between the low, flattened bulke, 

 the sub-circular, slightly triangu- 

 lar outline of which is sometimes 

 distinctly indicated, but more 

 often very obscui-e : auditory 

 meatus small, nearly circular. 

 Iinier pterygoid plate small but well developed, the hamulars 

 short, turned slightly outward : mesopterygoid space much 

 narrower posteriorly than anteriorly, its greatest breadth less 

 than half length, its length much more than width of palate 

 bctN\ ccn posterior molars, its anterior border broadly rounded : 

 region outside pterygoid plate inflated and with low but distinct 

 longitudinal ridge, convergent anteriorly with that forming edge 

 of mesopterygoid space. Interorbital region sulvcylindrical, dis- 

 tinctly expanded at middle. Rostrum narrower and somewhat 

 abruptly lower than interorbital region, its narrowest point just 

 behind canines : nares with evident posterior emargiuation. 

 Anteoi-bital foramen moderately large, its jxisterior border OAcr 

 metastyle of */('-, the plate forming outer wall of canal usually 

 nnich nari-ower than foramen Lachrymal foramen above anteor- 



YW. 1. 

 Titlpii eur,tpK.t. y-.n. size. 



