35° 



TELEOSTEI 



slides backwards and forwards over the ethmoid, the maxilla being 

 pushed forward by the palatine (Figs. 333, 441). An accessory 



Fig. 331. 



, B. and S. (From Kidewood, Proi\ Zool. Soc.) Dorsal view of the 

 hyobranchial skeleton ; the epi- and pharyngobranchials have been removed from the right side. 

 entigerous plate covering the three first basibranchials ; cb5, fifth ceratobrancliial ; eb*, 

 fourth epibranchial ; ch, ceratohyal ; ct, cartilage ; eh, epihyal (or upper ceratohyal) ; et, fourth 

 and fifth basibranchials fused and covered with small dentigerous plate; gh, thin bony plate 

 covering the basihyal (glossohyal) ; hhs, third hypobranchial ; lih, hypohyal; pb > and p&3, first 

 and third pharyngobranchials. 



masticating apparatus is often developed on the branchial arches 

 (Fig. 460). 



The median urohyal, attached in front to the hypohyals and 



Fig. 

 . Rich. (After Gunther.) 



passing back between the sternohyoid muscles, is quite peculiar to 

 the Teleostei (Figs. 303, 358); similar but paired bones occur in 

 Pohji'i 



