Fig. 292. Pimelodella gracilis (Slightly reduced) 



One of the many small tropical catfishes from northern South America. There are 

 three pairs of barbels, or "whiskers," two pairs of which are extremely long. The fish 

 is an active one, and, as it swims about the aquarium, the black line against silvery 

 sides produces a striking and pleasing effect. Like other catfishes, it is easily fed. 

 Breeding habits unknown. 



L 



Fig. 293. Corydoras undulatus or Armored Catfish (Life size) 



Sometimes known to aquarists as Callichthys. There are many species closely 

 resembling this photograph, and they all come from northern South America. 



Corydoras is a quaint little fish and very well adapted to life in the aquarium. 

 Principally a ground-feeder, it is regarded as something of an aquarium scavenger 

 Quite harmless. Breeding habits, page 237 (No. 3). 



Fig. 294. Hypostomus species 

 One of the oddities from South America, the fish tenaciously holding on to the bottom 

 or sides of the aquarium by suction of the mouth and lower part of the body. Specimens 

 so far imported have lived a long time but have not yet been bred. Catfish family. 



283 



