1904.] 



OSTEOLOGY OP THE ELOPIDyE AND ALBULID.E. 



81 



mainly indebted to Hyrtl (Denkachr. Akad. Wiss. Wien, x. 1855, 

 pp. 47-57, and xxi. 1863, pp. 1-10). 



The epibranchial organ is by no means confined to these fishes, 

 but occurs, in one form or another, in Hyodon, in Heterotis 

 (Hyrtl, Denkschr. Akad. Wiss. Wien, viii. 1854, pp. 73-88), in 

 certain Oharacinoid fishes (Hyrtl, Denkschr. Akad. Wiss. Wien, 

 xxi. 1863; Kner, Yerh. zool.-bot. Ges. Wien, xi. 1861, pp. 189- 

 192 ; Sagemehl, Morph. Jahrb. x. 1885, p. 114), in Osphromenus, 

 Anabas, &c. (Cuv. et Yal., Hist. Nat. Poiss. vii. 1831, p. 328 and 

 pi. 206 ; Peters, Miill. Arch. Anat. Phys. 1853, pp. 427-430), and 

 probably in several other forms not related to the above-named 

 genera. In the last instances given, the whole of the epibranchial 

 and pharyngobranchial skeleton is modified, while the fifth cerato- 

 branchials remain unaltered. 



al, 



an, 

 bb, 



bo, 



br, 



bs, 



cb, 



ch, 



cor, 



ct, 



d, 



eb, 



ecar, 



ecp, 



eh, 



enar, 



enp, 



eo, 



ep, 



/, 

 qh, 

 'lib 

 Ml, 

 lim 



ill 

 iop. 

 me, 



Abbreviations employed in the Figures. 



metapterygoid. 

 maxilla, 

 nasal, 

 opisthotic. 

 opercular, 

 orbitosphenoid. 

 parietal. 

 , pliaryngobraucliial. 

 palatine, 

 premaxilla. 

 postt'rontal. 

 preopercular. 

 prefrontal, 

 pro-otic, 

 parasplienoid. 

 post-temporal, 

 posterior tempo™! fossa. 

 quadrate. 



sesamoid articular, 

 surmaxilla. 

 supraoccipital. 

 , subopercular. 

 spicular bone, 

 squamosal, 

 supratemporal. 

 subtemporal fossa, 

 symplectic. 

 vomer. 



Proc. Zool. Soc— 1904, Vol. II. No. YI. 



