Unfortunately, the niatcTial al haiul was so badly jireserved that it 
precluded any study of comparative anatomy ' (1907b, p. 303). 
The second specific character of Sch. mansoni is. according to 
Dr. Sambox, given in its 'different anatomical habitat’ and iti 
‘specific pathogenic action’ (190.S, p. 32). ‘Sch. wansoni does not 
affect the genito urinary organs, its ova are eliminated solely by waj 
of the intestine ; they are never found in the urine. The palicnl- 
harbouring this parasite suffer from a haemorrhagic enteritis, bul 
they never present haematuria ’ (1907a. p. 117), The third reason for 
assuming the existence of a Schislosomum different from Sek 
hcEmatobimn, is found by Dr. Sa.MUON in the peculiar geograph:ca: 
distribution of Sch. viansoni. Arcortling to the data published in 
literature, the new species i.s ‘ probably ’ alone pre.sent in the \V«l 
Indies, for endemic iiaemaluria is unknown there. The same may be 
said with regard to tlie Congo Free State, wliere careful recenl 
investigations have shown the absence of haeinaturic bilharziosis an.! 
he frequency of a rectal infection, in which the ova of the parasite 
bear invariably a lateral spine. I„ the Cape C:olony, on the other 
land, haematuna is very common; IIarlev. liROCK. and others 
working m tho.se drstnets slate in their articles on the subject, that 
both TD 'vith the lateral spine. In Egvpl, 
Ibablv th \ " I'-emaluria to winch it gives rise. That, 
fh" sclVe ,r"n " --bounded, and 
distorted (p 3 "^'^Sir^Pat^ looked upon as abnormal and 
producing laterar"^'‘“ a presence of a 
Sch. hcemaiobium. eggs, but confounded it with 
what in detail '^ 1 ‘ose reasons gi\ cn by Dr. Sambox some 
important - foriliof.-. T*" zoological. It is the most 
the first place a ' zoological,"1°*^ “t ""VP*"''''''' P'“ ‘‘ brieH.v, o 
safely it ,s necessarv ■ ’ a new speces 
if possible, easil°v‘’“”” ‘'“"^‘^"tly present 
characters by which ”‘^°Snisable zoological 
forms. The les«; ror. f ^ ^ distinguished from related 
less constant and the less definite the characters of . 
