136 W. M. GRAHAM — RESULTS OBTAINED FROM WATER-RECEPTACLES, &C. 



8. Pyretophorus cosfalis 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 aud apparently sympathetic variations of certain species 

 are shown by the tables. 



London, 8 June, 1911. 



