Temperature of water in live-car 19° C. 



From the table it may be seen that the average 

 number of eggs in each alimentary canal was 500, and 

 that two individuals each contained over 1,200 eggs. 

 These figures do not include the partially digested 

 and crushed eggs, as only whole eggs and recently- 

 ruptured eggs were counted. The intestinal contents 

 of all of the 15 suckers examined, however, included 

 oily masses of partially digested eggs. This average 

 of 500 eggs per sucker is also probably lowered 

 through the loss of eggs crushed or digested while 

 the fish were in the live-car, as but one-third of the 

 15 averaged were killed immediately after their cap- 

 ture on the spawning grounds. Aside from the eggs 

 of Percina caprodes, the alimentary canals of these 

 suckers contained little or no organic material, but 

 fine sand was always mixed with the eggs. This fine 

 sand undoubtedly was swallowed with the eggs, a 

 portion of it at least attached to them, as the eggs 

 of the log perch are covered with a coat of sand and 

 debris shortly after leaving the body of the female. 

 The average volume of sand in each alimentary canal 

 was about five times the average volume of unbroken 

 eggs present, as one cubic centimeter of log perch 

 eggs contains about 440 eggs. 



