TETEODOX. 



143 



1. TETRODON FAHAKA. 



Linn, in Hassolq. Reise Palcest. p. 441 (1762) ; Giiutli. Oat. Fisli. viii. p. 290 



(1870); Bouleug. Fish. Nile, p. 544, pi. xcvii. (1907); Pellegr. Poiss'. Bass. 



Tcliad, p. 140, fig. (1914). 

 Tetvodon Uneattis, Linn. Syst. Nat. i. p. 411 (1766) ; Forsk. Desjr. Aiiim. p. 76 



(1775) ; Giinth. Petlierick's Trav. ii. p. 267 (1869). 

 Tetrodon pli'jsa, Geoffr. Dfiscr. Egypte, Poiss. p. 19^ pis. i. & ii. (1809) ; Joannis, 



Mag. Zool. 1835, iv. pi. ii. 

 Bon Jerap, Rifaud, Voy. Egypte, pi. cxcix. (1830). 

 Tetrodon strigosus, Bennett, Proc. Zool. Soc. 1834, p. 46. 

 Crai/racion fahaka, Steind. Sitzb. Ak. Wifen, Ixi. i. 1870, p. 572. 



Head as long as broad or a little longer than broad, its length (to the 

 gill-opening) 3 to 3^ times in total length. Snout rounded, twice as 



Fijr. 97. 



Tetrodon falialca. 

 Khartum (F. N.). 



long as eye, which is lateral and contained 6 to 7 times in length 

 of head *; iiiterorbital region feebly convex, 2 to 2J times in length of 

 head ; no nostril, but two nasal tentacles on each side, measuring about 

 J diameter of eye. Dorsal rounded, 12-14. Anal rounded, 10-11, 

 originating below middle of dorsal. Pectoral rounded-subtruncate, f to 

 I length of head. Caudal rounded, as long as or a little longer than 

 head. Caudal peduncle ^ to f length of head, 1^ to 1^ times as long 

 as deep. Head and body with minute spiaos, except on snout, round 



* Young specimens have the head and the eye much larger in proportion than tne 

 adidt. 



