SKULL OF RAXA nGKL5>A. D 



The Parasphenoid (text-figs. 2 & 6. ps.) is of the typical form, 

 but unusually sti-ong. The transvei-se Kmb lies unrler the 

 occipito -auditoiy massej«. Its posterior border is deeply concaTe 

 and the ends of the transverse limb are considerably wider than 

 the jK>i-tion near the middle line. The po^tei-ior median process 

 of the longitudinal arm is short and often elegantly pointed. 

 The anterior longer longitudinal arm. besifles forming the floor, 

 rises up on each side to foi-m a portion of the Literal wall of the 

 cranium. About the middle it Ls broader than at the ends. The 

 outer edges articulate with the prootics. the cartilaginous poition 

 of the cranium, and the sphenethmoid. .The cartilaginous portion 

 of the side-wall of the cranium is relatively mucb smaller than 

 the anterior .sphenoidal portion. 



Text-figTire 5. 



yp 



B. fiffrina : separated bones from the sknlL 

 pm., prp Tna-riTIa ; m- TnaviTIa ; ■., nasal ; fp- fronto-p^uietal : s^ sqnamo^ftL 



The I'ronto-parietals (text-figs. 1. 3. and o./p-) are adequately 

 described by Parker (4) in the following words : — 



•• Above, the fronto-parietals form a strong roof with a 

 notch in front, the remains of the fi-ontal suture, but are 

 whollv coalesceti beyond this : they end behind in two broad 

 winsrs which spi-ead over the hinder region of the ci-aninm 

 almost to the end. At first hollow in the middle, in the 

 postorbital region they develop a sagittal crest, which opens 

 out into two tempoi-al wings. The temporal part dips into 

 the orbit and then rises over the ear-masses moulding on to 

 their sinuosities. The sides are notched, and the end has a 

 concave marsin." 



