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opaque colour contrasts well with the larger yellow coloured female worm 
Owing to its shorter length the male worm can be more easily traced from 
the head to the tail. 
When thus completely dissected out it is found to measure from 
42 to 45 mm. in length. The maximum width in the centre of the body is 
only .146 mm. whilst at the head it reaches not more than .116 mm. (In 
another case head .075, body .175 mm.). 
Like other male Nematodes the tail is curled ventrally round its 
spicule, which though small can just be seen with the naked eye as a white 
speck. 
Alimentary Canal. 
The alimentary canal of the male worm presents a striking contrast to 
that of the female and to that of the male found in the buffalo’s tumour, in 
the possession of a very muscular and easily recognised stomach. The 
oesophagus is .511 mm. in length, i.e., a little shorter than in the female 
(.584 mm.). It is suddenly expanded into a thick muscular intensely white 
stomach which runs a straight course and measures 2.2 to 2.5 mm. in length. 
After this the alimentary canal narrows again into the intestine, which 
is a little bigger than the oesophagus. The intestine is continued along the 
length of the worm and finally ends in the cloaca. 
No definite glands may be seen opening into any part of the digestive 
tract. 
Genital System. 
There is only one Testis, elongated in shape and lighter in colour than 
the gut lying by its side. Above it reaches a variable distance, but below 
it is continued into the single vas deferens which finally terminates by 
opening into the common cloaca. At the cloaca which is situated 
.15 to .20 mm. from the tail extremity, one notes two spicules—an anterior 
and longer one (? penis) and a shorter and posterior one (? sheath). The 
anterior spicule, which is continuous with the vas deferens through the 
funnel shaped opening, measures .262 mm. in length, whilst the shorter or 
posterior spicule is .116 mm. long. 
The general arrangement and structure of these spicules are much the 
same as in the corresponding worm of the buffalo and therefore need not be 
repeated here. To the two spicules are attached powerful muscles for their 
free movements. 
The interesting part lies in the papillae, of which two pairs are anterior 
to the cloaca (preanal) and at least six pairs are posterior. 
These papillae are much larger and more distinct than in the buffalo’s 
worm, where only two can be faintly made out. The two preanal ones are 
particularly large, the first lying 18 u. anterior to and the second just in 
front of the cloaca. 
The second and third pairs and the third and fourth are each 37 u. 
distant from one another, whilst the last three pairs are quite close together. 
They diminish in size as we go backwards. 
The position and relation of these various papillae present a more 
striking picture when seen from the ventral surface than when viewed 
