THE FISHES OF ALASKA. 



IVV 



females (106) examined was 5.25 inches; of fh(> (44 i males, 3.84 inches. The extremes were: Females, 

 3.25 and 8 inches; males 3.31 and 5.69 inches. The number of young in 81 females examined varied 

 from 8 to 36, the average being 15.76. The position of the young in the ovary was determined in 54 



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FiG.20.— Cymatogasteraggregatus (Gibbons). Male. 



fishes. They were found to contain a total of 813 joung, 652 or SO per cent i if which were lying with the 

 head toward the head of the mother lish. while Kil or 20 per cent had the head toward the tail. In one 

 instance all the young i^ll) had the head forward, and in every case but one the majority of the young 



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Fig. 27.— Cymatogaster aggregatus. Female. 



had the head forward. The one exception was with a 5.o-inch fish with 12 young, ft of which had the 

 head toward the tail. The young were quite uniformly 1 inch to 1.25 inches in length. Those of an 

 unusually large female (6.75 inches) were each 1.63 inches long. 

 The table on page 278 gives these data in detail. 



