136 WwW. M. GRAHAM—RESULTS OBTAINED FROM WATER-RECEPTACLES, &C. 
8. Pyretophorus costalis was found to breed habitually in the domestic water- 
vessels of the native yards. 
9. The water in many of these vessels was found to be very foul and in many 
cases contained sewage. 
10. Cyclops and other Crustaceans were found to inhabit and breed in the 
native yards, 
11. The simultaneous and apparently sympathetic variations of certain species 
are shown by the tables. 
London, 8 June, 1911. 
