, PLATE VIII 19 20 2i 22 L. BousFrELp KALA-AZAR 1—6. Parasites found in chronic case (3 years’ duration): 1. Typical parasite; 2. Slightly degenerate enlarged parasite; 3—6 are believed to be further stages in the degeneration of the parasites within the body.

7—9. Forms only seen in chronic cases—apparently parasites in which the blepharoplast resembles in size and staining the macronucleus, unless it be a divided macronucleus.

10—11. Degenerate forms found in very chronic case (5 years’ duration).

12—14. Degenerate forms found in case (? 6 months’ duration).

These forms were found frequently in long-standing apyrexial cases, which presented typical symptoms and signs of kala-azar, and are believed to represent degenerative processes occurring in the parasites within the body.

15—16, Parasites similar to those depicted in figs. 1—14.

17. Parasites showing curious division of blepharoplast.

18. Parasites found in leucocyte in the peripheral blood.

19—22, Leishman parasites, after one injection of orsudan, showing marked vacuolation.

py objective, No, 8 ocular