[ 3 1 ] 
Both varieties live much in the same way, but besides grass the Indian 
bullock, which is more expensive, gets a liberal supply of broken rice boiled 
down to the consistence of gruel. 
Unlike the buffalo the bullock is not fond of shallow mud pools or 
dirty river banks ; in fact it has to be washed regularly by the keeper, and 
hence the conditions under which the buffalo and bullock li\ e differ widely. 
At the local slaughter house, imported Siamese and native bullocks princi¬ 
pally are killed. The Indian ones are too expensive, but the few aortas of 
the latter that have been examined show no deviation from the usual rule as 
regards the frequency of worms within them. 
The anatomy of the bullock’s aorta differs in that it is smaller m size, 
the walls are not so thick, and there is less abundance of tough elastic 
tissue. 
The distribution of the various branches of the thoraic aorta is just the 
same as in the buffalo (see description above). On opening an infected aorta 
one usually finds round blind projections with no trace of the long opaque 
freelv swinging worms. A more careful scrutiny, however, brings to light 
yellowish wavy lines or serpiginous tracks running along the length of the 
aorta. The tumour is smooth and shiny, yellowish white in colour like that 
of the rest of the aorta, and measures from 5 to 15 mm. in diameter. No trace 
of any worm can be noted immediately around its neighbourhood, but a few 
millimeters away the yellow wavy serpiginous tracts described above are 
always seen running down the length of the aorta for a variable distance. 
Some do not proceed straight but are bent at an angle, whilst portions of 
the same may even lie almost transversely. In fact so very convoluted are 
these wormy tracts that when present in large numbers the whole aorta 
may feel much beaded to the touch. 
Occasionally the tumours are shrunken up, leaving a non-projectmg 
surface, but the yellow wavy worms lying as they do immediately beneath 
the intima are quite distinct. . . 
Even when these round blind tumours and serpiginous tracts are not 
present, round white scars may often be seen scattered over the mtima o 
the aorta. ....... . ,, 
The proportion of smooth healthy aortas m the bullock is greater than 
the corresponding ones in the buffalo, as the following table shows. 
Percentage. 
9 9 
No. of Bullock’s aortas examined 155 ... 
with Tumours 39 ••• 
Serpiginous tracts 25 
Scars and wrinklings 32 
,, ,, of healthy one 59 ••• 
Total number of tumours in 155 aortas, I 57 * 
Average for each infected aorta 1.6. 
99 
9 9 
99 
25.2 
16.1 
20.6 
38. 1 
Round Blind Tumour. 
The round blind tumour was found in about a quarter of aortas 
examined. . ,. 
To demonstrate the contents is not a simple matter of dissection, as 
the tumour has to be torn away piecemeal. 
