102 



A 



COMPARATIVE ANATOMY 

 B A*. 



Co 



n 



- 1 



* 



& ^:: 



ii 

 in 



IV 



Fio. 7">. A, DORSAL, B, VENTRAL, C, LATERAL VIEW OK SKULL OF Sip 



Jy<, external nostril ; tiny, angular ; Car, carotid foramen : Ch, internal nostril ; 

 Co, occipital condyle : deitf, dentary ; JJK, apertures for ducts of tentacular 

 gland ; E, ethmoid region ; F, frontal ; M, maxilla ; Xji>; naso-preniaxilla ; 

 Orl>, orbit ; Pal, palatine ; Po, petroso-occipital ; Pj>. Pp', palatine process 

 of the naso-premaxilla ami of the maxilla ; /'*, parasphenoid, united 

 posteriorly with the auditory and occipital elements ; J't, pterygoid ; Qn, 

 quadrate; <SV/, paraquadrate ( " squamosal ") ; Sfji, stapedial plate; I'o, 

 vomer ; X, vagus foramen. 



D, Hyobranchial apparatus of the larva of IcJithyophis H/iifiiioxa. After 

 P. and F. Sarasin.); Co 1, 2, first and second basal elements (copula-); //, 

 hyoid ; I IV, branchial arches, 



