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Two new species of Trypanosoma61Indicesforms. Although CL of both parasites are comparablebut conspicuous difference in CB and nuclear size areFI = 1.82evident. Moreover, the flagellar lengths of both theKI = 1.72parasites also differ. The granulation pattern and theNI = 1.16vacuolation of both the parasites cannot be treated atDISCUSSIONpar. It is, therefore, proposed that the parasitediscovered from the blood of H. fossilis collected fromH. fossilis has been considered to be an ideal host for the fresh waters of Bareilly be designated as a newtrypanosomes. A dimorphic form, T. mukundi was species and, accordingly, the name T. heteropneustidiscovered by Raychaudhri and Misra (1973) from the n.sp is proposed to accommodate the parasite with thefresh waters of Kolkata, India existing as “slender” specific characters as given in this account.and “stumpy” forms. Table II shows a comparison ofdimorphic parasites recorded from the test fish. T. DIVISION IN T. heteropneusti N.SP.mukundi Raychaudhuri and Misra (1973) is aSome forms undergoing division showed peculiardimorphic species and the present form warrants afeatures in the blood of H. fossilis. However, only twocritical examination of the said species. The contour offish out of 163 specimens exhibited multiplyingthe parasites differ, the present form being “slender”forms. Division commenced in the nucleus showingand “elongated”, whereas T. mukundi has beenwell differentiated chromatin prior to division (Fig.reported as “slender” and “stumpy” form. The present1I). The two centrally-placed, round to ovoid nucleiforms have therefore contrastingly been described asand the single, undivided kinetoplast was placed“small” (23-30.5 µm) and “large” (33.1-43.8 µm)Table I: Dimorphic trypomastigotes from Channa (= Ophiocephalus; all measurements in µm)Host Parasite O. gachua C. punctatus C. punctatusAuthor(s) T. gachuii T. aligaricus T. saulii : n.sp (N=50)Component Misra et al., 1973 Gupta and Jairajpuri, 1982 Present studyparts/forms*Short Slender Small Large Minuta MagnaCF 36.4 53.9 34.37 54.68 24.0 35.5(34.25-35.5) (53.25-55.3) (18.0-33.0) (30.2-52.0)CL 24.9 42.1 23.50 46.18 18.5 28.2(23.01-25.0) (44.95-46.8) (12.2-24.4) (26.3-36.4)CB 2.3 3.9 1.65 2.45 1.9 2.6(1.5-1.8) (2.1-2.6) (1.0-2.5) (2.0-3.6)FL 11.1 10.9 10.87 8.50 6.6 8.8(10.25-13.5) (7.82-9.4) (4.0-8.2) (8.0-12.0)NL 2.4 2.7 3.00 3.73 3.2 3.7(2.5-3.5) (3.6-3.8) (1.0-6.0) (1.0-6.0)NB 2.2 2.7 1.12 2.02 1.6 2.0(1.0-1.2) (1.8-2.2) (1.0-3.0) (1.0-4.0)KB - - 0.45 0.25 1.2 1.25(0.4-0.5) (0.21-0.3) (0.5-2.0) (0.5-2.0)KL - - 10.5 0.51 1.6 1.9(0.5-1.6) (0.4-0.6) (1.0-2.0) (0.5-2.0)* CB= Breadth of cell body; CF = Total length; CL = Length of cell body; FL = Flagellar length;KB = Kinetoplast breadth; KL = Kinetoplast length, NB = Nuclear breadth; NL = Nuclear length