52 MARINE BIOLOGICAL LABORATORY. 



with a special problem and found it to be the centre of 

 inquiries, leading in all directions into the unknown. 

 So it is with all special subjects in biology. The farther 

 we pursue them the broader and more interesting they 

 become. Nothing could be farther from the truth than 

 the idea that such questions are isolated, and devoid of 

 interest to all except the specialist. 



4 



I 



