110 



symptoms continued, on the second day fever developed, but all 

 symptoms disappeared on the third day. 



ARACHNOIDEA. 



Genus LINGUATULA Frcehlich, 1789. Tongue worms. 

 Species LINGUATULA SERRATA Frcehlich, 1789. 



The larva of this parasite is found encysted in the entrails of 

 rabbits, cattle, and certain other animals, and it becomes mature in 

 the nasal cavities of canines. 



Both the larva and the adult have been reported for man, and the 

 larva has been reported as occurring in Mus decumanus. 



As canines are not fond of eating rats, the presence of the larval 

 tongue worm in the latter is of more academic interest than prac- 

 tical importance, and although the theoretical possibility must be 

 admitted that a dog by eating rats might become infected with tongue 

 worms and eventually might transmit the infection to man, these 

 possibilities seem somewhat remote. Remote possibilities must also 

 be admitted to the effect that if a person ate a rat infected with 

 tongue worms this person might become infected. 



