321 



observed on the slide. A conical projection 

 forms at one point of the fertilized gamete (copula). 

 This elongates slowly and gets curved, forming 

 an egg-shaped or spindle-shaped mass. The 

 conical portion eventually separates, leaving 

 behind the remains of the cell with the pigment. 

 The vermiculus is thus at first unpigmented, but 

 later again it is pigmented (Koch). In the fresh 

 specimen the protoplasm appears vacuolated, and 

 has a nucleus which is readily stained by Roman- 

 owsKY stain. 



Note' that the vermiculus (or ookinet) shews 

 forward, rotatory, and peristaltic motions. The 

 further development of the vermiculi is completely 

 unknown. 



Post-mortem. — Pigment is found in the 

 kidney, intestine, bone marrow, liver, and especially 

 the spleen. The brain, on the contrary, is almost 

 entirely free from it. 



It is probable that the halteridia of all birds 

 are not of the same species. Inoculation from 

 one bird to another is extremely difficult, if not 

 impossible. This may be due to the fact that the 

 parasites in the blood are in all sexual forms. 

 In monkeys we appear to have a parallel condition, 

 viz., gametes only in the blood, the asexual forms 

 being unknown. 



Haemamoebae in Monkeys 



3. H. kochi. — These haemamoebae occur in 

 monkeys. The forms usually met with are 

 sexual forms. Asexual forms resembling young 

 malaria parasites are very rare. Flagellation 

 can be seen in fresh specimens. The parasites 

 w 



