Oriental sore in Bagdad, together with observations on a gregarine in Stegomyia fasciata, the haemogregarine of dogs and the flagellates of house flies / by C.M. Wenyon.

  • Charles Morley Wenyon
Date:
1911]
Catalogue details

Licence: In copyright

Credit: Oriental sore in Bagdad, together with observations on a gregarine in Stegomyia fasciata, the haemogregarine of dogs and the flagellates of house flies / by C.M. Wenyon. Source: Wellcome Collection.

    67/94 (page 335)
    Fig. 13. Dividing flagellate. Within the kinetonucleus are the two granules which have not yet reached the sides of the kinetonucleus which appears to have a definite membrane. The two blepharoplasts clearly shown. Fig. 14. Dividing flagellate showing well the precocious formation of flagella. Though division is not complete the daughter flagella of the succeeding division are already forming. Fig. 15. Anterior end of a dividing flagellate showing blepharoplasts, rhizoplasts and diplosomes. Fig. 16. Anterior end of a dividing flagellate showing the dividing karyosome (?) within the kinetonucleus. Figs. 17-20. Dividing flagellates. Fig. 18 from a flagellate in which the kinetonucleus has been destroyed. It shows well the union of the rhizoplast and blepharoplasts by means of a faintly staining line. Figs. 21-36. A flagellate of trypanosome type from the malpighiaii tubes of the house- fly. They possibly represent forms of Herpetomonas muscae domesticae. Fig. 21. Dividing form. Figs. 22, 23, 27, 29, 31, 33-36. Various stages in the formation of the small pear-shaped forms (fig. 23) from the long forms (figs. 28 and 30). Fig. 24. Large dividing form. Fig. 25. Long dividing form without nucleus but still possessed of kinetonucleus and blepharoplasts. Fig. 26. Dividing form showing two granules within the kinetonucleus and two blepharoplasts. Fig. 28. Dividing form. Figs. 30 and 32. Typical long forms. Note the long drawn out flagellar extremity of the body. The kinetonucleus is always on the non-flagellar side of the nucleus. There is no free flagellum as this structure terminates at the blunt end of the body. is still single but close to its flagellar side are the products of the already divided blepharoplast. From the new blepharoplast a new rhizoplast narrower than the old one has formed, and this has grown out into the beginnings of a new flagellum. Patton believes that the new rhizoplast is divided off from the ftwh one, but it is certainly a new formation growing out from the divided blepharoplast. The blepharoplast alone divides. Porter claims to have watched the division of the flagellum in the living Herpetomonas muscae domesticae. From the stained smears examined by me, I can find no evidence of such a division. The flagellum is enclosed, as I believe, in a thin sheath of ectoplasm con- tinued from the body of the flagellate and it is within this sheath that the new flagellum grows out. As the flagellum increases in length both it and the rhizoplast increase in thickness till eventually the length and thickness equal those of the old flagellum. Such stages may be followed in figs. 17, 12, 10, 13, 16, etc. When the new flagellum has attained a certain degree of development, indications of division appear in the kineto- nucleus. Within this there is apparently a structure like a karyosome. Parasitology iv ,