xv, 4 De Leon: Balantidium Haughivouti 407 



Another subject for future investigation lies in the determina- 

 tion of the ability of Balantidium haughivouti to live in a host 

 other than Ampullai^id. This is important by reason of the fact 

 that the host is frequently eaten by persons living in the Phil- 

 ippine Islands. As has been stated, it shows no tendency to 

 penetrate the tissues of the host within which it has been studied, 

 but that is no criterion of what it might do in another host. 

 At the same time it would seem that the danger of infection in 

 man by this parasite is rather remote, if for no other reason 

 than that the character of the food it receives in the gut of 

 the Amqjullaria is such as would involve a rather revolutionary 

 readjustment of the parasite's metabolism on adaptation to a 

 life in the tissues of man. 



In conclusion, I desire to designate this species Balantidiuni 

 haughwouti in compliment to the man who first observed it. 



CONCLUSIONS 



The characters possessed by this organism indicate its inclu- 

 sion in the genus Balantidium. 



Further work is needed to determine definitely the functions 

 of the cytopyge and of the excretory systems. 



It is also in order to determine if there is any neuromotor 

 apparatus. 



A close relation is shown between the meganucleus and the 

 micronucleus. For the present it is assumed that this has to 

 do with division. 



Stained preparations of Balantidium haughivouti together 

 with shells of the snail AmpuUaria from which they were taken 

 have been deposited in the protozoblogical collection at the Bu- 

 reau of Science, Manila, and at the Smithsonian Institution in 

 Washington D. C. 



ACKNOWLEDGMENTS 



To Prof. Frank G. Haughwout, chief of the department of 

 parasitology, at whose instance this study was undertaken, I 

 wish particularly to express my appreciation of the stimulating 

 and material help and encouragement given me throughout the 

 course of the work. I wish to thank Prof. Sol F. Light, who 

 identified the snail host; Dr. Lamberto Leiva for material help; 

 and Prof. Ricardo Fernandez for assistance in translating from 

 the French literature. For permission to undertake this work 

 in another department while a member of the staff of the de- 



