74 



THE OSTEOLOGY OF THE REPTn.ES 



The Skull of the Rhynchocephalia 



(Figs. 60-63) 



[No manuscript. Some skull characters are noted on pages 20, 21, 

 25, 213, 279.] 



Fig. 60. Rhynchocephalian skull: Sphenodon (Tuatera), from the side and 

 above, pm, premaxilla; «, nasal; prf, prefrontal; /, frontal; pj, postfrontal; 

 /), parietal; /)o, postorbital; Jy, squamosal; wj, maxilla; y, jugal; 5y,quadrato- 

 jugal; y, quadrate; f, coronoid; ja, surangular; ^r/, articular; /)«, preartic- 

 ular; d, dentary; an, angular. 



Fig. 61. Thalattosaur skull: Thalaltosaurus, from above and from the side. 

 After Merriam. One eighth natural size. 



