[ 5 ] 
Examination of fresh blood films showed (i) young active amoeboid 
forms; (2) pigmented parasites, pigment very active and in form of fine 
granules; (3) hosts enlarged and pale; (4) sporulating bodies; (5) extra 
corpuscular forms; (6) small free pigmented bodies with the pigment very 
active. 
It may be noted that the prevalence of Quartan shown in 
Dr. McClosky’s report is not universal throughout the Federated Malay 
States. It is rare in Kwala Lumpur amongst Europeans and amongst the 
better class natives who are admitted to the General Hospital. Out of 255 
cases in which the blood was examined the proportions were Quartan, 
2 per cent. ; Tertian, 40 per cent.; and Malignant Tertian, 58 per cent. 
It is rare in other districts such as Klang. 
Dr. H. Wright (The Malarial Fevers of British Malaya Studies from 
the Institute for Medical Research, No. 1, Yol. 1) gives out of 251 cases 
percentages of 22.3 per cent. Quartan, 31 per cent. Benign Tertian, and 
46.2 per cent, of other types. 
Of the cases of Malaria treated at the District Hospital only 28.8 per 
cent, were from Kwala Lumpur. Of the remainder 45 or 23 per cent, of 
the total were from Gombak, a district where extensive works in partially 
cleared jungle are being carried out. Under such circumstances in Malaya 
Malaria is as severe and prevalent as in bad parts of Africa. 
The variation in the distribution of anopheles is dealt with fully 
elsewhere. 
Conditions Favouring Prevalence of Malaria. 
The conditions under which Malarial Fever becomes epidemic in 
Malaya vary. In large towns it occurs but only as isolated cases or small 
groups of cases. 
The more important places are:— 
(1) Where extensive works are undertaken in jungle. 
(2) In the low lands at the mouths of rivers and near the sea. 
Of the first class the works in connection with the Electric Power 
Station at Gombak may be taken as an example. This place is of particular 
interest as it is one of those reported to be free from mosquitoes. It is so 
to the extent that mosquitoes are not troublesome, are rarely found in the 
houses, and that mosquito curtains are unnecessary for comfort only. 
Examination of breeding places shows that mosquitoes are widely dis¬ 
tributed, and in particular that an anopheles, Anopheles Treachevii is to be 
found in every stream, and that other anopheles Myzomyia leucophyvus , 
Lophoscelomyia asiaticas, etc., are also to be met with in places. Anopheles 
Treacherii dies rapidly in dry air and is only found in streams in jungle. 
These streams are often rapid, and in hilly and rainy districts, such as 
Gombak, vary in size from mountain torrents to a mere trickle in the space 
of a few hours. 
The huts—bangsals—were situated at the edge of the clearing in the 
jungle and close to one or more of these streams. In most cases the 
clearings were very small and incomplete. 
