514 



A HcBfnatozooii in Human Blood. 



[part III 



In the later periods of their existence the movements of the Filarise become much 

 slower, and the plasma of their bodies more and more granular until eventually all 

 signs of activity disappear, and they are seen stretched or slightly curved in the field 

 of the microscope, having lost the snake rather than worm-like appearance, which, 

 from their tenuity and incessant coiling or wriggling movements, they had presented 

 during life (Fig. 32, below). 



If a little spirit, or other preservative agent, such as corrosive sublimate or carbolic 

 acid and glycerine be not added, their outline among the blood corpuscles will become 

 indistinct, and they will degenerate into mere shrivelled strings of a granular appearance, 

 no longer recognisable as Filarise. 



Fig. 32.— Hiematozoa as in Fig. 31, after the addition of preservative media, x 300. 

 Nos. 1 to 6. Preserved in weak spirit. 



(When the Filarise are observed in slightly decomposed urine they present the appearances here shown also. 

 Specimens 1 and 4 are specially refeiTedto at pages 516, 517.) 



. No. 7. Puckered condition produced at first by the addition of pure glycerine. . 

 ,, 8. Killed by exposure to the fumes of osmic acid. 



Some of the various aspects presented by them after death are delineated in the 

 above woodcut. In No. 1 of the above woodcut the Hsematozoon presents a granular 

 appearance throughout its entire length ; but in No. 2, a hyaline membrane is seen 

 to extend beyond the head extremity, and in No. 3 this transparent membrane appears 

 as if it were a continuation of the tail ; whereas in No. 4 it extends beyond them both. 

 In No. 5 the membrane appears as if slightly wider at the " tail " end, but is absent 

 at the opposite extremity, and in No. 6 the membrane is bent in the form of a hook. 

 In No. 7 it is seen puckered, on account of the addition of a thick fluid— when examined 

 after such treatment by a higher power, the outline of a membrane becomes clearly 

 evident opposite the constricted portions of the worm. The meaning of all the different 



