Chilomastix Mesnili(Wenyon, 1910)

Observations Upon Chilomastix from Bufo vulgaris, with notes on Chilomastix aulastomi

“…In Tetramitus (= Chilomastix) mesnili from man, Wenyon and O'Connor (1917) describe a single nucleus and one or more granules near the anterior end from which the cytostomial fibre and the cytostomial flagellum (when visible) take origin. Chalmers and Pekkola's (1918) description is similar, but in one cyst the karyosome was dumb-bell-shaped and this they interpret as an early stage in division. They state that they saw two nuclei in another cyst, but their photomicrographs are so indistinct that they give little support to this statement.…”

“…They call the right peristomial fibril the parabasal and the left the parastyle. Chalmers and Pekkola (1918) and Kofoid and Swezy (1920) both homologise this "parabasal" with the organ they call the "parabasal" in Trichomonas. This organ in Trichomonas is not a true parabasal but the basal fibre supporting the undulating membrane and its flagellum (Bishop, 1931); a true parabasal exists as well (Grasse, 1926).…”

“…Wenyon (1910) says that in Macrostoma ( = Chilomastix) mesnili the three flagella arise from a deeply staining chromatin granule. Chalmers and Pekkola (1918) describe three basal granules in the same species. Kofoid and Swezy's (1920) description of these granules agrees in number with Chalmers and Pekkola's, but they also describe a centrosome on the surface of the nucleus and rhizoplasts linking up the structures.…”

“…Alexeieff (1914, 1914 believed that the intestinal faunae of H. sanguisuga and Amphibia were 1 A study begun during my tenure of a Beit Memorial Fellowship and completed since I became a Yarrow Fellow. 2 The variations of nomenclature through which the genus Chilomastix has passed have been dealt with in detail by Chalmers and Pekkola (1918), Dobell and O'Connor (1921) and Wenyon (1926). " •…”