I tried to fertilise these in the usual manner by extracting the male organs and 

 crushing them in the water containing the eggs. On my return. I found less than 

 half the eggs taken were floating, but only about half of these last proved to be 

 fertilised. However, those which were fertilised were hatched in the hatching jars 

 without difficulty, and I obtained thousands of larvae. Some of the eggs were lost 

 before hatching because they ceased to float, and many larvse were lost for a similar 

 reason, as they began to sink two or three days after hatching. However, a large 

 number of the larvas were successfully kept alive until the mouth had developed, 

 the yolk was almost entirely absorbed, and feeding had commenced. Then they 

 all died. Thus when the eggs are once fertilised they can be hatched without 

 difficulty. 



