48 



DR. \V. a. RIBEWCJCID ON THE CRANIAL 



[May 3, 



examined, l)ut in the larger specimen the pro-otic foiins a, small 

 portion of the antei-ior wall. It is a deep fossa, and leads inwai'd 

 and upward beneath the flooi- of the posterior temporal fossa. 

 The Ifitei'al temjioi-al fossa. a,bove the anteiior pai-t of the a,i-ticul;\r 



Text-lia-. 15. 



pro 



so 



soc 



me 



P. 



soc 



pro bo ^ 



Cranium oi Alhula conorhynclms. 

 A, dorsal view ; B, liack view ; C, left side. For explanation of the lettering, see p. 81. 



surface for the head of the hyomandibular, is bounded above by 

 the squamosal and frontal, internally by the pro-otic and squamosal, 

 below by the pro-otic, externally by the postfrontal, and termi- 

 nally, i. e. antero-internally, by the alisphenoid. It is rather 



