[ 30 ] 
female. Copulation 
are also discharged 
unknown part. 
takes place inside the tumour and the embryos produced 
into it to be distributed later on to some hitherto 
Spermatozoa. 
The sperm cells produced by the testis are oval, spindle shaped, or 
cross shaped in appearance. Their largest diameter is io to 12 u Each 
possesses an intensely refractile nucleus surrounded by granular protoplasm, 
ihese cells may change their shape from one form to the other, but no inde¬ 
pendent movement has been seen. They are formed in the testis, and when 
mature pass down the straight vas deferens to be ejected through the narrow 
aperture in the anterior spicule. When seen under the microscope during 
the ejection of these cells, they are noticed to come out in strings, being 
attached to one another by means of some sticky substance so that they 
often appear as a bunch of grapes hanging on to the ventral surface of 
the tail. 
When stained, these sperm cells show a deeply coloured nucleus 
situated usually m the centre and occupying a large part of the cell. 
When in groups, these cells may each take a pyramidal form, being 
united together by delicate threads, the whole picture looking indeed like a 
bunch of grapes. No cilia or appendages of any sort have been seen. 
Other kinds of Tumours in the Buffalo s Aorta. 
Another form of tumour—the round blind tumour common in bullocks_ 
is on rare occasions found in buffaloes. Out of 93 buffaloes’ aortas examined 
m one solitary case this condition was found. In this instance, three round 
blind tumours were scattered over the aorta, one large and two small. A 
female of the worm to be presently described was found in the larger tumour 
but no male. 
Aortic Worms of Bullocks. 
A totally different species is found in the bullock. The tumour instead 
of being much raised and irregular is flattened and rounded in shape • it is 
quite blind as far as the outside appearance is concerned. No lar^e 
suspended worm emerges from it; and the female worm when dissected out 
is of a yellowish colour. It is imbedded in a dense stroma of fibrous tissue 
and moistened with thickish yellow liquid. 
Like the buffalo, two main kinds of bullock are met with in the Malay 
enmsula, namely, the Indian and the Siamese, though cross breeds are not 
uncommon. 1 he Indian bullock is a better developed and finer lookino- 
ammal, with long straight rounded horns standing almost parallel to one 
another. The Siamese or native bullock, on the other hand, is a smaller 
beast with short, rather curved, rounded horns pointing towards each other 
at the free ends. 1 he Indian bullock weighs from 400 to soo lbs • the 
Siamese slightly less. 
In addition, the Indian cow is the main source of the local milk supply 
whereas the Siamese cow provides little or none. 
