III. MALARIAL PARASITES AND SPECIES OF MOSQUITOES.
The greatest confusion still attends the classification of the malarial parasites. I follow the terminology which seems most closely to conform to the rules of zoological nomenclature. Schaudinn1 outlines the terminology which at the present time seems to be the most generally accepted one:Plasmodium malariæ (Laveran), the quartan parasite.Plasmodium vivax (Grassi and Feletti), the tertian parasite.Plasmodium immaculatum (Grassi and Feletti), the estivo-autumnal parasite.At the same time it is much more convenient for the sake of brevity and clearness to refer to the organisms described in this paper by their clinical manifestations, and the terms tertian, quartan and estivo-autumnal will be used, bearing in mind that these terms, although in a way unscientific, are distinctive and explicit.Before describing the parasites in detail it may be well to say a few words about the general differential diagnosis between tertian and