98 



REPELLING INTRUDERS. 



distance. His charges against them are most vigorous and 

 determined, and so frequent that he is seldom stationary for 

 a minute together. This almost incessant motion of the male 

 seems a special provision of nature; for were he to remain 

 still, only that portion of the ova which passes over him would 

 be impregnated, whereas by moving so much about, his milt 

 becomes distributed, in a manner, over the whole stream. 



PROCESS OF SPAWNING. 



