/•((/. 06. Gainbusta affiiiis {Ai'cragc size) 

 Also known as holbrooki, these fishes were the first of the live-bearers to be 

 generally introduced into the aquarium in America. The}' occur as far north as 

 Maryland and have been introduced into some swamps in Southern New Jersey, 

 where they are valualile eaters of mosquito larvae. They tear the fins of other 

 fishes. The darker specimens are the most sought after. Breeding habits, page 257. 

 Dark spot near vent of females is producd by unborn young. 



Fig. 6y. Bcloucsox bclicanus or Viviparous Killifish 

 (Slightly reduced) 

 These little fish are quite as bloodthirsty as their expression would appear to 

 indicate. After they attain adult size they prefer ])eing fed on small living fish, 

 although worms are taken under protest. Sec pages 257 (B 9) and 260 (N 2). 



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