Annual report of the Board of Regents of the Smithsonian Institution . also of houton (POrient^ or tropical ulcer; Biskra carbuncle,Aleppo carbuncle, Delhi carbuncle, etc.). But this parasite differssufficiently from the other piroplasms to cause certain authors to makeit the type of another genus, Leishmannia. At all events, all theseha^matozoans are inoculated into their hosts by the punctures of fact has been more than abundantly proven, especially bySmith and Kilborn, and confirmed by Koch and Lignieres, for theordinary bovine piroplasmosis; by Lounsbury for the cani
Annual report of the Board of Regents of the Smithsonian Institution . also of houton (POrient^ or tropical ulcer; Biskra carbuncle,Aleppo carbuncle, Delhi carbuncle, etc.). But this parasite differssufficiently from the other piroplasms to cause certain authors to makeit the type of another genus, Leishmannia. At all events, all theseha^matozoans are inoculated into their hosts by the punctures of fact has been more than abundantly proven, especially bySmith and Kilborn, and confirmed by Koch and Lignieres, for theordinary bovine piroplasmosis; by Lounsbury for the canine piro-plasmosis; by Motas for the ovine piroplasmosis; and by Theiler,confirmed by Laveran and Vallee, for the tropical experimenters have shown that one can voluntarily producethe piroplasmosis by causing healthy animals to be bitten by ticksintentionally infected. The species concerned, however, vary accord-ing to the piroplasm emj^loyed, and also according to the region inwhich it is examined. BELATION OP ARTHROPODS TO PATHOLOGY MAROTEL. 715. Fig. 9.—Ixodes hexagoniis. Male. Ven-tral aspect. After Salmon and Stiles. Thus, bovine piroplasmosis is inoculated by Ehipicephalus sanguin-eus, R. anmdatns (fig. 10), and R. decoJoratus; canine i^iroplasmosisby Ixodes ricimis, I. hexagonns (fio;. 9) ; Dermacentor reticulatus(fig. 12), and Hcvmaphy sailsleachl. Ovine piroplasmosis istransmitted b}^ Rhipicephalushiirsa; equine piroplasmosis by (Theiler, 1904) ; tropicalpiroplasmosis by R. aypendicida-tus and R. simus (, 1904) ; and, finally, hu-man piroplasmosis may be con-veyed, at Madras, by an ixodidallied to Argas, the Ormthodoruf<savignyi (Christophers and Dono-van, 1905). B. Sphvchoitosis.—The spiro-chsetes are spiral micro-organ-isms, the excessively slender bodyof which possesses a filiform nu-cleus and a lateral, undulatingmembrane, without a flagellum (fig. 11). Classified to-day amongthe bacteria, consequently in the veg
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