i6o 
From these observations we conclude: 
1. That ticks infected by spirochaetes lay infected eggs. 
2. That multiplication of the spirochaetes probably takes place 
in the eggs. 
3. That morphological changes in the spirochaetes also occur in 
the eggs. 
LITERATURE 
1. Koch, 1905. Vorlaufige Mittheilungen iiber die Krgebnisse einen Forschungs- 
reise nach Ostafrika. Deutsche Medizinischc Wochenschrift. 23 Nov. 
2. Dutton and Todd, 1905. Memoir XVII, Liverpool School of Tropical 
Medicine. 
3. Stephens and Christophers. The practical Study of Malaria, and edition, 
Williams and Norgate, London. 
4- JlREiNL AND Kinghorn, 1906. Memoir XXI, Liverpool School of Tropical 
Medicine. 
