Nachdruck verboten. 
Übersetzungsrecht vorbehalten. 
-Contribution to the study of the “Tree-Ducks” of the 
genus Dendrocygna. 
By rt Inatifin, 
R. W. Shufeldt, M. D, C.M. Z. S. = 
With Plates 1-16. 
Taken in its entirety, the literature of the genus Dendrocygna 
is quite extensive, that is to say when we come to review what 
has been published on the several species of birds contained in the 
genus. Up to the present time, however, no special researches have 
been made upon the anatomy of the various members of the group, 
apart from some meagre contributions to the osteology of one or two 
of the species. 
I have not seen “A Monograph of the Anatidae or Duck Tribe” 
by T. ©. Eyrox (London, 1838), as there is no copy of it in any of 
the Washington libraries; but I have before me the “Osteologia 
Avium” by the same author, together with its two Supplements 
(London, 1867, 1869, 1873). In Supplement I of this work, there 
are some fourteen Plates devoted to the skeletons of various ducks, 
geese, and swans, and other figures of tracheae and sterna of some 
of the species. Among these, on an unnumbered plate, we have a 
more or less complete skeleton of Dendrocygna arcuata. Like so 
many others of Eyrox’s representations of this class, however, it is 
but little more than a mere sketch, there having been no regard 
whatever paid to the portrayal of details with respect to any of the 
Zool. Jahrb. XXXVII. Abt. f. Syst. 1 
