14 
nigra, Oe. fusca, Fuligula marila, Glaucion clangula, Somateria 
mollissima, Pagonetta glacialis), gulis and terns, owls, (Olus 
brachyotus, O. vulgaris, Bubo maculosus), birds of prey (Åstur 
paålumbarius, A. nisus, Buteo vulgaris, Circus cyaneus, C. ærugi- 
nosus, Sarcorhamphus gryphus), waders (Numenius arcuatus, 
Grus antigone, Fulica atra), parrots (Loriculus galgulus), wood 
peckers (Picus martius), passerine birds (Sturnus vulgaris, Alauda 
arvensis). 
In the literature I could not find anything concerning this måt- 
ter.) It was my intention, therefore, to pursue the examination 
and to publish my results, but other work came in the way. Only 
occasionally, in my lectures and during my courses, I have men- 
tioned my observation of these facts, which still for many years 
were to escape attention. At last Chappellier 1910 published his 
remarks about Wolffian ducts found in adult females of some fin- 
ches (sparrow, canary, serin (Serinus hortulanus), and hybrid be- 
tween goldfinch and canary, I. c. 1910, p. 59). Also Chappellier 
was unable to find anything regarding this matter in the litera- 
1) In the older literature, in works by Rathke and Jacobson, I have 
found some indications pointing in the right direction. Rathke (1825, 
$ 68, p. 25) says regarding the structure now recognised as the mesoneé- 
phric El Wolffian) duct, in the chicken: "Beim weiblichen Geschlechte 
hat der beschriebene Theil seine sele Ausbildung in den vorletzten 
Tagen der Bebritung erreicht. Dann aber verkiimmert er, gleich den 
Wolffschen Kårpern, immer mehr, stirbt ab, und verschwindet zuletzt 
geraume, aber unbestimmte Zeit nach dem Auskriechen 
des Måhnchens sånzlich” On Tab. HI Fie. 12, hé represents Very 
" plainly the anterior part of the ducts (together with the right atrophying 
mesonephros) of a hen-chicken, three weeks after hatching. JåcobSCE 
in the work, where he is giving his interpretation of the «Gartnerian 
sinn on wiich this note may directly be founded, and ek 
I am not able to settle if J. himself may actually have made such ÉÉ 
servations — f. inst. during his investigation of the venous system 0 
the kidney in birds — or if he in using Rathke's work from 1825, which 
he knew and quotes, has interpreted the facts, set forth there, with the 
me perspicacity which led him to the correct Re of Gart 
une fglandular organ” of ruminants and swin 
