CAXIS MAGELLANICUS. 



•JO 



l)eyoncl a line joining the anterior margins of the two fourth upper 

 premolars. The posterior extension of the bony palate varies 



Fis. 21. 



Skull of the type of Casis magellanicus. 



considerably ; it may extend backwards to a line joining the hinder 



margins of the two hinder upper molars, or a little further backwards, 

 or not backwards beyond the middle of those molars. 



Centimeters. 



Basioa to ovalion 27 



„ sphenoidcum 4*4 



Sphenoideum to gnathion 11'3 



Length of palate 8*2 



Breadth „ 4-2 



Length of nasals 6*2 



Breadthof „ 1'3 



„ brain-case ^'1 



,, zygomata 9'1 



