﻿484 The Philippine Journal of Science im 



periodicity in all cases. While elephantiasis or other clinical 

 symptoms of infection with filaria are not common in this 

 institution, they are by no means unknown. 



The identification of the species of the Philippine filaria both 

 by Ashburn and Craig and by Phalen and Nichols was based 

 upon the study of larval forms alone. Several pathologists work- 

 ing in the Philippines, including Calvert (1902), Bowman 

 (1911), and Crowell,^ have observed sections of adult filaria in 

 the tissues, but so far as I am aware no intact adults have 

 hitherto been discovered. 



I am indebted to Dr. J. W. Smith for the adult filarise de- 

 scribed in this paper which were obtained from a cyst removed 

 surgically by his assistant. Doctor Manalak, from the inguinal 

 region of a Filipino in the hospital of Bilibid Prison. This man 

 was a native of Rizal Province and had, so far as known, never 

 been outside of the Philippine Islands. Examinations of his 

 blood for filarial embryos, both day and night, nine days before 

 and on the day of the operation were negative. The cyst re- 

 moved contained 1 adult male and 3 adult female filarise. One 

 of the females was broken in removing it from the cyst; the 

 other 2 females and the male were secured intact. 



The worms were washed in physiological salt solution, fixed 

 in hot 70 per cent alcohol, and preserved in 70 per cent alcohol 

 containing 5 per cent of glycerin. They were prepared for ex- 

 amination by evaporating the alcohol from the glycerin-alcohol 

 mixture and then mounting each in pure glycerin on a large slide, 

 under a large cover glass supported by pieces of glass at each 

 comer to prevent crushing the worm. 



The anatomy of these filarise, together with measurements, 

 has been very thoroughly described, because it is believed that 

 only by such careful descriptions can the identity of the filariae 

 of different countries be determined. There is a noteworthy 

 lack of careful and thorough work on the hitherto described 

 adult filaria, and it is intended that the following description 

 shall be accurate and complete for the species and serve for 

 comparison with the other filarise. 



DESCRIPTION OF THE FILARI.E 

 I. THE FEMALE 



General. — A long, slender, cylindrical, white worm. The an- 

 terior end tapers slightly to a short neck, and terminates in a 



' Not yet published. 



