DESCRIPTIVE KEY TO PAGES 2'i'i TO 232 259 



B12 



PYRRHULINA FILAMENTOSA AND COPEINA AR- 

 NOLDl are the only fish listed in this work having the peculiar 

 breeding habits here described. Both fish leap out of the water and 

 adhere for several seconds to the sides or cover of the aquarium, 

 which should be somewhat rough. Ground glass or slate will do. 

 Fifteen or twenty eggs are deposited at a time until from 100 to 200 

 are laid. A\'hen spawning is completed the female should be re- 

 moved. The male, by swift movements of the head and tail, splashes 

 water on the eggs at short intervals. The eggs hatch in from two 

 to four davs, after which the male parent should be removed, h^eed 

 voung on infusoria and later on small daphnia. 



B13 



EGGS ADHERE ON GLASS sides of aquariums or stones or 

 plants, remaining there until hatched in a few days. The young 

 swim in a shoal around the old ones as in B5 Group. Feed in similar 

 manner. 



B14 



STICKLEBACK male builds nest from bits of plants, glued to- 

 gether. After female deposits eggs he drives her away and assumes 

 entire parental responsibilities. See also page 117. 



B15 



POLYCENTRUS SCHOMBURGKI spawns on upper concave 

 side of small flower-pot, laid on its side. Newly hatched young hang 

 from leaves by means of a hook on the top of their heads. I-:ggs 

 and young protected by male, as female is apt to eat them, and should 

 be removed. 



Badis badis spawns on the inside of a small, upright flower-pot, sunk 

 half way in the sand. Remove both parents when young are first observed, 



B16 



PTEROPHYLLUM SCALARE spawn like B5 Group, except 

 that eggs are deposited on broad-leaved plants. Eggs hatch in l^A 

 days. The best results are secured by removing the plants and eggs 

 to a receptacle where a small stream of warm water can run in such 

 a way as to maintain a gentle circulation around them. The water 

 may be artificially heated if necessary, or the circulation can be 

 furnished by the liberation of compressed air in the bottom of the 

 tank. In captivity the parents have a strong tendency to eat both 



