The point of origin of the flagellum in Trypanosoma is usually near the anterior end, but may vary considerably (cf.
Schaudinn has stated, however, that Trypanomorpha becomes, in certain phases, attached to a red blood-corpuscle (ectoglobular), and, in others, penetrates inside one and eventually destroys it (endoglobular); while his other avian parasite, Trypanosoma ziemanni, apparently draws up into itself the white corpuscle (leucocyte) to which it becomes attached.
Until lately it remained quite uncertain, however, whether the invertebrate merely conveys the Trypanosomes or whether 1 Trypanosoma equiperdum, the cause of dourine in horses and asses, is apparently only conveyed by the act of coitus.
These maladies are caused by minute unicellula animal parasites (haematozoa) of the genus Trypanosoma (see Trypanosomes); and recent investigations have shown that, under normal conditions, the particular species of Trypanosoma concerned (T.
The common Trypanosoma rotatorium of frogs (fig.
Ziemanni and Trypanomorpha noctuae, among avian parasites, described by Schaudinn (50); Trypanosoma inopinatum, among batrachian forms, described by A.