204 
Proceedings of the Royal Irish Academy. 
had resided in a part of Madras most of his life in which elephantiasis 
was very common amongst his poorer neighbours. He enjoyed fair 
health until about ten years before the operation, when he was first 
attacked with periodic fever, attended with swelling of the scrotum. 
These attacks occurred monthly for about two years, and the scrotum 
became enlarged to the size it was at the time of operation, or about 
that of a large cocoanut; it was rough, thickened, and covered with 
small nodules, which occasionally exuded a sticky fluid. His blood 
was examined under the microscope for embryos, and two were found. 
He made a good recovery after the operation. 
As already stated, these two worms were found wriggling to- 
gether in the lymph on the cut surface of the tumour. Surgeon J. 
Smyth, M.B., Professor of Pathology, Madras Medical College, kindly 
mounted them for me, but unfortunately bent the male worm in the 
process, on account of its great tendency to coil — a fact also noted by 
the late Professor Lewis in the portion he found. 
The following is Professor Bourne's description of the specimen 
which he kindly furnished me : — 
Specimen I. 
This is the cephalic extremity of a female, PI. xiv. (fig. 1). The 
body is capillary, smooth, nearly uniform in thickness. The mouth 
is simple and circular, and the head is devoid of papillae. In 
many members of the genus of Pilaria the head presents six oral 
papillae. The vaginal aperture (fig. 1, g. p.) is placed immediately 
behind the pharynx ; the whole vagina in this specimen is everted or 
simply protruded : it is difficult to say which. Dr. Smyth informs me 
that this protrusion took place during mounting. In Cobbold's figure 
the vagina is not protruded, and I think that, very probably, the pro- 
trusion may take place during life. There is a curious structure pro- 
jecting (fig. 1, X.) from the side of the body ; it is impossible to make 
out the exact relations of this structure, or to determine definitely its 
nature ; I am inclined to think it is due to some injury. 
Specimen II. 
Thi« is of great interest, as it belongs to a male, and ex- 
hibits the caudal extremity, which has never been described (figs. 
2, 3, 4), The specimen measures about one and a-quarter inches 
in length. It is thinner than the female worm, and exhibited, 
while livittg, a great tendency to coil. Testicular structures are 
