XIII 



PTTVLUM CHORDA r A 



523 



as usual, dcvclopeiJ fioni a special bony centre, and a distinct 

 suture is often recognisable between it and the scapula until a 



n.u» 



p.maoc 



tnax 



s.oc 



oc.cont 



par.oc 



Fig. 1132.— Skull of Dasyurus (hiteral view). al.sph. alisphonoid ; nnri. angular process of 

 mandible ; n: frontal ; ju. jui^al ; Icr. lacrymal ; ina.r. maxilla ; nag. nasal ; oc. coml. occipital 

 condyle ; oi-O. sph. orbitosphonoid ; par. parietal ; par. or. ijaroccipital process ; p. max. \irc- 

 maxilla ; .?. oc. supra-occipital ; .57. squamosal ; si/. zygomatic process of squamosal. 



mann 



eac.oc 



bds.oc 



Fig. 1133.— Skull of Rock "Wallaby (PHrogah penicillata) (ventral view). Letters as in 

 Fig. 1132, except all. alisphenoid. lu addition, has. oc. basi-occipital ; has. sph. basi-splienoid ; 

 e.r.oc. ex-occipital ; pal. palatine ; pt. so-called pterygoid ; tt/. tympanic. 



comparatively late stage. In the young condition (when the foetus 

 is attached to the teat), the coracoid is comparatively extensive and 



