74 



FISH GALLERY. 



be erected and used by the fish as a very dangerous weapon, by 

 striking with the tail towards the right and left. Naseus, 



Fig. 58 



Naseus unicornis. (From the Indo-Pacific Ocean.) 



remarkable for the horn-like projection on its forehead, also 

 belongs to this family. 



The Lahyrinthici (Case 14) are freshwater fishes of Tropical 

 Africa and the East Indies. They are able to live for some time 

 out of water, or in thick or hardened mud. In an accessory 

 branchial cavity there is lodged a laminated organ which has the 

 function of assisting in the oxygenization of the blood. The 

 Climbing-Perch {Anabas scandens) is well known for its faculty 



Fig. 59. 



Gourami {Osphromeims olfax). 



of moving for some distance over land, and even of ascending 

 trees. The Gourami {Ospkrormnus olfax) is reputed to be one 



