Prowazekia weinbergi, Mathis and Léger, 1910.
This species was found in the fæces of men, both healthy and diarrhœic, in Tonkin.[52] It is pear-shaped, 8 µ to 15 µ long by 4 µ to 6·5 µ broad. The flagella occur at the broad end.
The discoverers think that Prowazekia weinbergi is an intestinal inhabitant, but non-pathogenic, since it was found to occur in the fæces even when obtained with aseptic precautions.
Prowazekia parva, Nägler, 1910.
A free-living form found in the slime on the stones at the biological station at Lunz. Another Prowazekia was found in 1914 in tap-water in Calcutta.
Family. Trypanosomidæ, Doflein.
The Trypanosomidæ, broadly considered, are uniflagellate organisms, the flagellum being at the anterior end. The flagellum arises near the blepharoplast (kinetic nucleus), which lies anterior, near or posterior to the nucleus.
The following genera will be considered:—
Trypanosoma—with an undulating membrane along the length of the body.