i8o 
gaining the liver at sliort intervals, it beroiucs probable that, {ron 
the beginning, there will be males and females. In this cast 
the females, gro\s-n up to the sexual stage will not have to wait long 
for fertilization. They will produce a few abnormal eggs, but are 
soon taken up by the males and carried to the pelvic organs On^ 
whole, therefore, ojily a comparatively re.stricted number of lateral 
spilled eggs will be deposited in the liver; they may, subsequently 
be joined by larger numbers of lerminal-spined. 
1 ne cnier habitat of the adult worms is undoubtedly the bladde 
The chief vein which leads them there is the inferior mesenteric vein 
I will point out in passing, that during the journey an occaawiil 
couple, before reaching the vein named, may accidentally get intoi 
side branch coming from some other part of the bowel. In such i 
case the worms would give rise to an isolated focus of infection, « 
a separate growth at an unusual place. Such unusually locatfQ 
lesions have often been observed, aiul are. I think, correctly expUined 
le \\ay alluded to. flic inferior mesenteric vein lead.s the worm: 
o the haemorrhoidal plexus dose to the anus, but not immediatelyte 
im^iorlant anatomical point 
betw^r^ connection, wide enough to let the worms pass. 
Smith ^ rectum ynd those of the bladder. Dr. ELLIOT 
Since he'*^^ -^’iidly made a dissection of the respective parti 
himself return to this aiiatouiiral question in detail 
exist. wMe enZi^rilX^ " " 
even three to nass i ’ couple only, but two and perhaps 
worms in veins which to ' ^ subsequently found the 
connecting branches i f '*'‘’'** course, weresach 
I will not omtt 
in which Trematodes ^'^^cction to recall the remarkable 
the microscope followed^ r bc>dics. I have under 
’^•■vae. The actual oneninTfl"''"'' 
mentary ’ hosts is often s ^ '«ake in the skin of these 'suppk 
an hour glass; but the ^ *^'*'*t the worms assume the shape of 
There is, therefore, every *t. evidently without difficulty 
manage to travel through ^^‘^'ty that male Bilharzia worms ma) 
not exceed a half or ev^n ^ ordinary diameter of which doe? 
There is thus no 
c parasites have a direct route fro® 
