Index Letters. 



al 



= 



anterior lieacl line of 

 organs. 



pit 



n 



ana 



= 



anterior nasal aperture. 





NA 



ANT 



= 



antorbital. 





as 



csa 



= 



anterior semieircnlar canal. 



PA 



cse 



= 



external semifircnlar canal. 



pc 



e 



= 



eye. 





pmc 



ESC 



= 



extrascapular. 





pna 



ESO 



= 



lateral extrascapnlar. 





POP 



ESO" 



= 



mesial extrascapular. 





PSF 



ETH 



= 



ethmoid. 





PST 



ETHp 



= 



primary ethmoid. 







PR 



= 



Frontal. 





PMX 



ic 



= 



infraorbital canal. 





sac 



toc 



= 



infraorbital canal. 





sc 



ip 



= 



infraorbital pores. 





SC 



ip^ 



= 



first infraorbital pore. 





SCL 



ip^ 



== 



fourth infraorbital pore. 





SO 



MB 



= 



mandible. 





sp 



mdl^ 



= 



first mandibular tooth. 





SQ 



mi 



= 



middle head line of pit organs. 



sic 



mx 



= 



so called cliain of maxillary 



sto 







bones. 





Ili 



branches of latero-sensory 



nerves. 



nasal. 



nerve sacs. ' 



parietal. 



preopercular canal. 



preoperculo-mandibular canal. 



posterior nasal aperture. 



preoperculum. 



dermal postfrontal. 



postorbital ossification ; 



sphenotic. 



premaxillary. 



sacculus. 



supraorbital canal. 



suprascapular. 



supraclavicular. 



supraoccipital. 



supraorbital pores. 



squamosal. 



supr atemp o r al canal. 



supratemporal sense organs. 



utricnlus. 



