13 
but the egg was lying in the tubar, not in the ulerine part of the 
oviduct. The ostium and the cloacal opening were normal, and so 
was the ovary. On the right side was found a very distinet Wolff- 
ian duet (without eoils), beginning in front from a broadened and 
flattened part — eontaining remnants of mesonephrie tubules — 
and ending behind in a eloaeal papilla; also on the left side of 
the eloaea, just inside the margin of the opening of the oviduet, 
a similar papilla was observed ^). 
Taking these faets together I thought to have before me a 
pseudohermaphroditie hen. To make this safe and for eomparison 
I took to examine some well-grown ehiekens, males and females. 
Mueh to my surprise I found that every hen-ehieken examined 
showed Wollfian duets distinetly reeognisable in the whole of their 
extent, but without eloaeal papillæ. Further examination of quite 
adult hens gave a similar result; only in very aged speeimens no 
traees of Wolffian duets eould be seen. Subsequently I extended 
the examination to other birds, and by and by a number of dif- 
ferent speeies eame under anatomieal observation with the result, 
that almost all fullgrown females examined were in possession of 
quite reeognisable Wolffian duets, in some eases to be seen plainly 
in their whole length, in others only partially; in very old speei¬ 
mens, however, the duets were not visible, or at any rate not with 
eertainty. Generally the right duet is most easily observed, while 
the greater part of the left may be hidden by the oviduet or by 
the origin of the suspensory ligament of the latter, the only part 
to be deteeted being the flattened anterior part eonneeted with 
remnants of the mesonephros. Also the right duet may to a great 
extent be eoneealed owing to adherent air-saes.^) 
In the following birds I have observed the duets: domestie 
fowl, pheasant (Phasiamis colchiciis), pigeon, several wild dueks 
(Anas boscaSy A. crecca, Spatiila clijpeata, Dafila aciita, Oedemia 
The hen (now mounted in the collection of the Zoological laboratory of 
the University) was demonstrated, and an account on arrhenoidia in birds 
given in the meeting of the Natur. Hist. Society Jan. 18th 1901. 
“) In most cases I have not been able to settie if any genital papillæ were 
present in the cloaca; most of my material was handed over to me from 
a private collector, and consisted in bodies from which the cloaca had 
been cut away in taking off the skin for mounting. 
