PLEURONECTID.l!. 



399 



Appendix to the Anacanthlni (jadoidei. 



XENOCEPHALUS. 



Xenocepliahis, Katip in Wiegm. Arch. 1858, p. 85. 

 Head verj^ large, truncated, cuirassed with plates and armed with 

 spines ; body small Only one dorsal and anal, separated from the 

 caudal by a small interspace. Vent in the posterior half of the body 

 bmall teeth m the jaws ; none on the vomer or the palatine bones. 



New Ireland. 



1. Xenocephalus armatus. 



Kiuvp, I. c. p. 86. 



D. 7. A. 10. C. 20. P. 21. V. 5. 

 Caudal fin lai-ge. Shields on the head yeUowish-brown, the naked 

 n the brrb ir V -"'"'-i . ^"^^ daA-brown, with black ^ots 

 ]?ewT,l'nS ^'^'''"'^^'°^^^'''' fins yellowish-white. {Kml) 



Fam. 7. PLEURONECTID^. 



Poissons plats. Cm: Rkjne Amm. 

 Pleuronectidaj, Ftcmuiff, Brit. Anim. p. 178. 

 Heterosomata, Bonaparte. 



Body strongly compressed, flat, with one of the two sides, which 

 IS always turned upwards, coloured, whilst the other is colourless 



side , and although the bones are present on both sides of the skidl, 

 fin? are not equaUy developed or sjTnmetrical *. Dorsal and anal 

 fins exceedingly long, without divisions f. Gills four ; pseudobran- 

 chiae well developed; air-bladder none. 



Carnivorous fishes, Uving on the sandy bottom of the coasts of aU 

 the regions; many ascend rivers. 



» Tliis is unique in the division of Vertebrate animals. 

 hZ\t So doTnl fi " *^1 ^r^' '^PP'^'"'^ ^° <"°"" ^ remarkable exception. 



aa H s S ?, U 1. f "P°'f'^ °^ *"° P°'-''°"^ '^^"'^■'■■■"g i» structure. However 

 roie lafion foi r I'^'" '•'/'■•='">"g 0"l.v. ^e do not ventm-e to propose a generic 

 appellation for it, and insert only the following abstract :- 



Hippoglossus kingii, Jenytis, Zool. Beagle, Fish. p. 138. pi. 26. 

 D. 18+48. A. 51. 

 ra^'m-fT^^^i '^""I'^ences anteriorly to the upper eye, and its anterior eighteen 

 Eve, o . rhlT Jv °T'' ^'''," ^'i*? ^""°""^g. apparently fornung a distinct portion, 

 mfo hn f If H . f i ''""f: '^.•^*""' ^'•'^'" '""^•l' °tl^'^'- The Ifeiglit of the body is 

 curvS ab,l tL^ V™f'' r^^"' ''''"^''^^- ^^'"•''1 !'■"« ^''^^^ subsemicirciar 

 Vd ar • P*^*^'"™'- Uniform light brown. {.An.) 



