IQI5.] T. SOUTHWELL : Indian Parasites of Fish. 327 
fortunately I have not had time to make a careful examination of 
this parasite, and I am at present uncertain of its strict zoological 
MOSICION SS 2aks/2 ek In the living condition it measured 15 inches 
long and 1} inches broad. It was quite flat, and had a thickness 
of ~,thinch. The preserved specimens, of which I have 3, measure 
gt inches long, ? inch broad, and are about } inch thick. The ex- 
tremities are rounded and terminate in a minute, acute point. 
At one extremity there is a minute sucker-like aperture situated 
centrally, whilst at the other extremity there is a similar but 
slightly larger aperture situated laterally. This latter aperture 
appears to open to the interior of the worm. The edges of the 
worm are straight and parallel. A pair of narrow blackish tubes 
tun along the lateral margins, one on each side. Down the centre 
of the worm, and stretching from one extremity of the worm to 
the other, is an opaque milky-white mass 4 inch broad. On each 
side of this mass there are a series of black coiled tubes, };th inch 
in diameter disposed in bunches, also running the entire length of 
the worm, but situated for the most part on one side. No other 
apertures could be detected. In consistency the worm is that of a 
stiff (milky-white) jelly, (in formalin).’’ 
For assistance in working out the anatomical details of this 
worm I am indebted to Dr. Ekendranath Ghosh, L.M.S., M.Sc., 
Assistant Professor of Zoology in the Medical College, Calcutta. 
The following measurements of the specimens (preserved in 
formalin) have been taken recently :— 
Length. Breadth. 
Specimen I eee 2a Ona th: a 20) tie, 
Somes a ROU a) Soars Sot) ag eae 
III S88) TOO Ashe cos see 59s), 5 
») 
The testes lie scattered about through the parenchyma. Ata 
point about 15 mm. from the posterior extremity, the paired vas 
deferens unite in the middle line, and open by a minute pore I 
mm. from the posterior extremity. 
The germarium is situated in the middle line 15 mm. from the 
posterior extremity. It is 7mm. long and 3°5 mm. broad. Im- 
mediately posterior to it are the paired follicular shell-glands. 
These are each 3 mm. long and together are 3 mm. broad. The 
vaginal pore is 2 mm. from the posterior extremity. The vitelline 
glands are paired, linear, and cylindrical, one on each side, near 
the lateral margins. They extend the whole length of the worm. 
At 4 mm. from the posterior extremity of the worm their ducts 
curve towards the vagina and open close to the shell-gland. The 
uterus is a long convoluted tube having exactly the same form as 
that figured for A. foliacea. It opens by a minute pore, which is 
situated at the base of the small anterior end of the worm. In 
this respect it agrees with A. liguloidea, Diesing, and differs from 
A. foliacea (Rud., 1819). It differs, however, from A. ligulotdea in 
the absence of a vagina, anterior to the germarium. The situation 
