166 
few, in other cases more, and in others again, crowds of the sane 
abnormal eggs as had been seen in the specimens with the internal 
defects. In order to fully understand these statements one must,oi 
course, have some knowledge of the anatomy and biology of tbe 
parasitic worms in general. I do not expect the ordinary medical 
man to have them, nor does he want them ; but I strongly recommend 
studies of the sort to all those who indulge in ' formulating ideas' 
with reference to helminthological questions. Anyone 
would be laughed at if he tried to write a tale in a language of ich 
he did not know the alphabet ; but I might quote dozens of passages 
from modern papers on helminthological subjects which leave no 
doubt that the author did not know the significance of the terms he 
used. 
Putting the facts observed in various species of Trematodes 
together with what liad been seen by some earlier obseners and 
myse in t e young Bilharzia worms, I came to the conclusion that 
the lateral-spmed must be abnormal eggs. I added that 
unimpregnated or isolated females would, jwrhaps, be ‘ unable to 
int°ern"‘'t°r " I do not claim that this 
a serfe f r tased o. 
Bilharzia° txtarest natural relatives of the 
rcu","'' " '• ■ 
.«,» j D “..S*"' "™- ’I'" » ■■ 
‘ immature ’ female and" 'T ‘t'rminal-sp.ned egg was seen m 
‘ is disposed of' T that by this observation my theoi}' 
what hasty in ‘''***’ Sambon is some- 
his own. I see th theories which arc in contradiction 
condition of the soerimT^ >'Oung friend Leiper states the 
of spermatozoa in her oviduct 
or was it not ? I fnrth • '' worm, therefore, fertil'^^ 
the case with an ooen mT I everyone who will look a' 
line of demarcation betw»- ** matheniab^^ 
eggs are formed " thT oo"t “‘‘X’ ^ 
middle of the bodv at which is situated at about 
young females found in thr^^I'T ^ 
They are gradually pushed i lateral-spi^^ 
y pushed along the uterus till at the end they 
