ANIHr.VL TKYPANOSOMIASES IN THE ANCr.O-F.ri YTTIAN SUDAN 



47 



previilunco of tho sIuiiiUt ami the stout foniis, and tliis alone, taken witli tlie fact that the 

 ti-ypanosomes are measured just as they come on tho slide, will save one from the pitfalls 

 of detailed critical analysis. Following still in Bruce's footsteps wc give charts showing 

 the curves of the distribution by percentages in respect to length. Chart 1 is a 

 reproduction of a cliart prepared by Colonel Sir David Bruce in London in 1910. 

 Chart 2 was compiled in Khartoum, and on this chart is show-n the striking resemblance 

 between the curve obtained here and tlie curve distribution of the strain of T. hrncei from 

 Uganda, 1909, as depicted in the Proceediwj.-.- of the Eoi/al Society, B., Vol. 83, 1910 

 (Colonel Sir David Bruce and others). 



Chabt 1 



Type 1. — Chart compiled by Colonel Sir David Bruce, 1910 



/' 1'- ri 14 15 16 17 IS 111 -id 21 22 2.3 24 25 26 27 28 29 aO 31 32 33 .34 36 .36 37 3S 3a 



Fii 12, — Carre 'listrihution by length -^f Typ^ 1 



Chaet 2 

 Type 1. — Chart compiled in Khartoum, 1911 



/' 12 13 14 15 16 17 18 19 20 21 22 23 24 26 26 27 28 29 30 31 32 33 34 36 36 37 38 39 



Fi^, 13 — r'nrvp rli.ttrihntinn by length of Type 1. Dotted Line — 7". hntcei, Klirirt.outn :^.ili.l Tin-^— T'. h-ttct'i, ^^■iti'l.i 

 N,B. — Tbri Kliartotim Cur\-e was compiled from 150 nieasuiemeuts. 



Added interest is given to these curves if they are compared with the two charts given 

 of Khartoum Type 2 — T. eransi (page 51). 



Breadth. The long slender forms average from 1 to 2 microns ; tlie short stout forms 

 from 2 to 3 microns. 



