392 GABRISON. 



globular shell gland which fills the space between the anterior testicle and the 

 ovary. Uterus fairly well developed ; its coils filling the median fields between 

 the excretory tracts from the acetabulum to the ovary on the right side and 

 extending eaudad of the ovary on the left to the border of the anterior testicle. 

 Its anterior extremity is continued into a well developed vagina which passes 

 diagonally across the median line dorsad of the acetabulum to reach the female 

 genital pore, which is situated just to the outer side of the male pore. 



Ova from 88.8 to 114.7 m long by from 53.5 to 81.9 fi broad, averaging 99.58 

 by 50.04 |ii; develop miracidium in about 10 days after leaving host. Further 

 development unknown. 



Habitat. — Intestine of man. 



Type locality. — Ilocos Sur, Northern Luzon, Philippine Islands. 



Type specimex. — Number 240-A (co-types number 240), Helminthological 

 Collection, Bureau of Science, Manila, P. I. 



FREQUENCY, LOCALITY, AND PATHOGENISIS. 



Over 5,000 native Filipinos, representing all parts of the Islands, 

 have been examined for intestinal worms during 1907 and the first three 

 months of 1908. That only five infections with Fascioletta have been 

 encountered would seem to indicate a very low frequency with regard to 

 the population of the Islands as a whole. 



However, all five of the infected prisoners came from the north- 

 western provinces of Luzon, and two of them, including the one from 

 whom the worms were obtained, had lived all their lives in the Province 

 of Ilocos Sur. Accordingly, there is some indication that the parasite 

 may not be equally distributed throughout the Islands. 



Only the two cases which appeared in April of the present year were 

 examined clinically. Questions and answers had to be passed through 

 two interpreters (Tagalog and Ilocano) and only fragmentary and rather 

 uncertain information could be secured. Both prisoners had lived in 

 Ilocos Sur all their lives. They had worked bare legged in fields over- 

 flowed with water; fish was an important part of their diet; they had 

 not suffered from any sickness except "fever" — which, facts, excepting 

 possibly the last, would apply to the great majority of the population. 

 At the present time neither complained of any illness nor would either 

 admit having or having had any intestinal trouble. Physical examination 

 was negative with the exception that one of the prisoners was somewhat 

 anaemic, the haemoglobin registering about 85 per cent. In this case in- 

 fections with hookworms and whipworms also were present. 



