186 THE ZOOLOGIST. 



decreasing in size as they go inwards. All the gill-rakers bear 

 teeth. There are no pharyngeal teeth. There is a small, 

 elongated, narrow group of villiform teeth on the upper part of 

 the limb of the fourth epibranchial, and two moderate-sized 

 narrow plates on the fifth arch of villiform teeth ; against these 

 the teeth on the fourth epibranchial work. A long plate of 



Fig. II. 



OSTEOGLOSSUM BICIREHOSUM. 



teeth extends from the tongue to the junction of the third hypo- 

 branchial with the basibranchials. There is a curious leathery 

 pouch under the forward part of the mandibles, very distensible, 

 which makes one think of a Pelican when one looks at this fish 

 (fig. II.). 



Arapaima gigas, the Arapaima of British Guiana, and called 



