C YPRINIFORMES 



eth 



Skull and anterior vertebrae of Glorias magur, H. U. A dotted line indicates the course of 



FIG. SOS. 



I.i'l't-side view of head of Clarias lazera, C. and V., with branchial chamber exposed by 

 removal of operculum. a, accessory respiiatory organs attached to top of gill -arches ; an, 

 anterior nostril ; b, barbel ; br, gill-lamellae ; pn, posterior nostril. 



