312 ARTHUR DENDY. 



this means into the alimentary canal, as might easily be the case, the 

 only way in which the animal could rid itself of the obnoxious matter 

 would be to cast out the alimentary canal, and this, owing to the 

 structure and relations of the parts concerned, which have probably 

 been specially adapted for the purpose, is most simply and readily 

 effected by the rejection of the entire visceral mass. This appears 

 to me to be a not improbable hypothesis, and the only one that will 

 explain the facts. 



