Translation of abstract: The transmembrane potential of the gregarine Bregarina blaberae, protozoan parasite, is -58+/- 2mV (standard error). There exists a nonlinear relationship (in the potential and logarithm) of the extracellular concentration of potassium. The membrane of these cells are not selective at rest, and the ratio of the sodium permeability to the potassium permeability is 0.11.
Quick exerpt of conclusions: The Gregarina blaberae consists of a doubled plasmic membrane, and the two membranes defining a "vesicule aplatie", not selective at rest, and in the ratio P(Na)/P(K) =0.1. The trimembrane wall is permeable to K+ ions.