dropped to the bottom of the tank and stood 

 on their tails in a cluster directly under the 

 nest. They were then onlv about one-eighth 

 of an inch long. By the 26th they had started 

 to swim. From the 22d they were fed on 

 dried lettuce leaf and fine daphnia, but as all 

 young fishes of oviparous species are provided 

 with a yolk sac, from whir-h they derive sus- 

 tenance while undergoing the earliest stages 

 of development, it is probable that the dried 

 lettuce did no more than provide food for the 

 development of infusoria and for the daphnia, 

 all of which later became -available for the 

 young Chaetodons. In a week's time the fish 

 had increased to a length of about three- 

 eighths of an inch. By July 20th the black 

 and red markings on dorsal and ventral fins 

 were plainly discerrible. B- Tulv 25th, when 

 five weeks old and half an inch long, they 

 were perfect reproductions of adults. 



The plants in which the nests were made 

 were the roots of the water hyacinth and 

 Myriophyllmn. In addition to the nests in 

 the plant masses, some hollows were fanned out 

 in the sand and gravel, but it was found that 

 this was done to uncover the fine fibrous roots 

 of plants like Valisneria and sagittaria, on 

 which to deposit the eggs. It is quite possible 

 that a closer examination would have shown 

 this to be the fact in Mr. Schubert's case, as he 

 refers to Valisneria as the r'ant used and pref- 

 erable for the purpose, O^ the other hand, 

 it is quite possible that in the absence of the 

 roots they might have spawned on small stones 

 or whatever solid substance might have been 

 present. I once had a species of Enneacanthus 

 to spawn on the glass of '^ ■> aquarium, the 

 eggs being plastered in a single layer, just 

 as they are deposited by the common sunfish, 

 Eupomotis Gibbosus. 



It is also possible that the younger and 

 smaller individuals of the larger species may 

 also spawn on plants and V^f^t the "pot-nests" 

 are only made by the older and larger ones. 

 These, however, are onb suggestions for 

 future observation. 



Later Mr. H. R. Lippincott was also fortu- 

 6i 



