466 



TEXTBOOK OF ZOOLOGY 



POST FRONTAL. 



FRONTAL. 



PRE MAXIUt-A 



DENTARY 



IMASAU 



MAXIl_I-A 



ECTETHMOID 



MESETHMOID 



QUADRATE 



ARTICULAR 



ANGUL-AR 



HYOMANDIBUI_AR 



METAPTERYGOI D 



I NTER OPERCULUM 

 PRE-OPERCUl_UM 

 BRANCHIOSTEGAL 

 RAYS 



SUB OPERCUL-UM 

 OPERCULUM 

 PECTORAL 

 Gl RDLE 

 DEFENSIVE 

 SPINE 

 PECTORAL 

 RAYS 



PTEROTIC 

 PHENOTIC 



SUPRA- 

 OCCI PI TAL 

 CERVICAL 

 VERTEBRA 



PELVIC RAY 



DORSAL RAY 



TRUNK. 

 VERTEBRA 



ADIPOSE FIN 

 ■CENTRUM 

 NEURAL spine: 



ANAL RAYS 

 HAEMAL SPINE 



CAUDAL 

 VERTEBRAE 



CAUDAL RAY 



Fig. 254. — Skeleton of Ameiuru^ natalis Le Sueur, lateral view. 

 Evans from dissections by Rose Newman.) 



(Drawn by Titus 



