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THE F1;ES1I-\\'ATE1; fishes of EL'ROl'E. 



than the rnmtiil. The nasal aud other .shields lie iu front of the remarkable 

 ethmoid ossifications. 



The eyes are rather lari^e, round, equal in diameter, and entirely seen in a 

 view of the skull from above. The frontal interspace which separates them 

 measures five times the orbital diameter. The nares are larg^e, rather distant, 

 and the lower narine is nearly ecpial to the diameter of the eye. There is a 

 small row of pores on the anterior mar<4"in of the snout, over which numerous 

 small ossifications extend. 



The mouth lies immediately below llie orbits in the middle of the under 

 side of the head, and its width is nearly cf|ual to the width of the frontal 



-HEAD or ACI1>ENSER IlECKELII, 

 SEEN FUOM AliDVE. 



Fig. 19G.- 



KELII, SEEN 



interspace. The hinder lip is very imperfectly developed. The outer pair of 

 barbels is the longer, and when laid back reaches nearly to the mouth. The 

 barbels are near to the anterior end of the snout ; in the median line in front 

 of them is a. slig-ht ridg-e, and the under side of the head, both behind and in 

 front, is reticulated with large ])ores (Fig. I'JO). 



There are twelve slightly elevated dorsal shields, which have no conspicuous 

 spine, and are only slightly keeled. The first is broadest and flattest. At 

 first th.- sliields arc broader than long, but after the third the length and 



