Report of first expedition to South America, 1913 . ation From the description given above of the parasite as ob-served in the red blood-corpuscles it appeared that we had todo with a species of organism possessing some of the char-acteristics described for Anaplasma or of Theileria, but alsodiffering in other characteristics described for each of thesegenera. The rounded bodies, in their form and size, and inthe fact that they apparently consist entirely or almost entirelyof chromatinic substance, resemble certain bodies which werefirst observed by Theobald Smith ^ and later by Theiler ^ inth
Report of first expedition to South America, 1913 . ation From the description given above of the parasite as ob-served in the red blood-corpuscles it appeared that we had todo with a species of organism possessing some of the char-acteristics described for Anaplasma or of Theileria, but alsodiffering in other characteristics described for each of thesegenera. The rounded bodies, in their form and size, and inthe fact that they apparently consist entirely or almost entirelyof chromatinic substance, resemble certain bodies which werefirst observed by Theobald Smith ^ and later by Theiler ^ inthe red blood-corpuscles of cattle afflicted with Texas forms were subsequently found in the red blood-corpuscles of other animals afflicted with disease, and thesebodies are now classified as Anaplasmata. The bacilliform 1 M. Rowley-Lawson: J. Exper. Med., 1913, xvii, 324. 2 Smith: Rep. Bureau Animal Indust., Wash., 1891-92, 177, and Plate iv. , 2, 3, p. 302. 3 Theiler: Ztschr. f. Infectionskrankh. der Haustiere, 1910, viii,
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