78 FISH GALLERY. 



[Case 15.1 are chiefly tropical fishes, which have the jaws transformed into a 

 sharp beak, the teeth being soldered together. 



The Embiotocidce are marine fishes characteristic of the fauna 

 of the temperate North Pacific, the majority living on the 

 American side, and only a few on the Asiatic. They are vivi- 

 parous. 



The Chromides are freshwater fishes of rather small size, from 

 the tropical parts of Africa and America. Some are herbivorous, 



Fig. 64. 



&(B 



11 Bulti " of the Nile (Chromis niloticus). 



the others carnivorous. Chromis niloticus, the " Bulti " or " Bolty " 

 of the Nile, is one of the few well-flavoured fishes of the Nile. 

 Several species are common in Lake Tiberias. 



Order III. ANACANTHINI. 



Bony fishes without spinous rays in the vertical and ventral fins ; 

 the air-bladder, if present, without pneumatic duct, and the ventral 

 fins, if present, jugular or thoracic. 



They form two divisions, viz. the Gadoidei (Cod-fishes), in which 

 the head and body are symmetrically formed; and the Pleuro- 

 nectoidei (Flat-fishes), in which the head and part of the body 

 are unsyrn metrical. The former group contains four families : — 



