The Species of Malaria Parasites

a position to use their microscopes. I have read with much interest Lieut.-Col. O. A. R. Berkeley-Hill's article in your issue for last May, and have been struck with the fact that subtertian crescents were found in the blood films from five patients who were inoculated with the blood of persons suffering from benign tertian malaria. At first sight this evidence appears quite a formidable argument in favour of the mutation of species theory, but there appear to be several loopholes in the evidence. Tn the first place, there is nothing in the article to indicate that any preliminary blood examination of the inoculated patients was carried out; therefore there is