— 279 — 
'Fhe clisease causecl by Piroplasma gihsoni is characterised by 
a slow onset, chronic course followed bv anaemia, wasting, en- 
largement of the spleen and liver, and by fever; haemoglobiniirie 
bas not yet been seen. So far only two hounds bave died of the 
disease, but many of theni are cpiite useless for hunting; Weal- 
thy No 33, in whose blood Piroplasma gibsoni was first found 
on December iith, is ncnv extremely emaciated, and there appears 
to be little hope of her recovery. One of the characteristic sympt- 
oms in the hounds was the enormous enlargement of the spleen, 
whose lower extremity could frequentlv be seen projecting on the 
right side. 
The method bv which Piroplasma gibsoni is transmitted in 
nature bas not yet been discovered. On the first jackal examined 
a species of Haemaphysalis (P[. bispinosa) in ail its stages was 
entremelv abundant and although larvae, nymphs and adults of 
this tick were placed on dogs Nos 13, 14 and 15, they hâve not 
yet developed the parasite. A species of Rhipicephahis was also 
found on three of the jackals, but as the specimens were not suit- 
able for experimental purposes T hâve not been able to utilise 
this tick. Three voung jackals hâve been procured and as thev are 
uninfected T hope later to be able to carrv ont a sériés of trans¬ 
mission experiments with ticks. 
Tn four of the jackals examined T found a new species of mam- 
malian leucqcvtogregarine which differs markedlv from that of 
the dog in that it undergoes its schizogonv in the spleen as well 
as in the bone marrow of the jackal. 
Tn conclusion T wish to take this opportunité of recording the 
discoverv of two other species of Piroplasma, one in the blood of 
the Tndian Mongoose (Herpestis mungo) and the other in the 
blood of the spotted deer (Cervus axis). T will reserve the com¬ 
plété description of these parasites for another occasion. 
Posiscript. — Since writing the above there hâve been sever- 
al further developments which will be best recorded in the pré¬ 
sent paper. 
Wealthv Idound No 33 died on Februarv 23 rd after having 
lingered for several davs. 1 -Ter sjDleen was found to be enormous- 
Iv cnlarged weighing 500 g. and it contained several infarcts: the 
liver weighed T.250 g., shewed macroscopie évidences of fattv 
degeneration and was verv friable. The subeutaneous tissue was 
Still deeplv stained with trvpanblau. — T)og No t 2 inoculated with 
