THE ANATOMY OF THE COLUMBZ. 231 
Number of 
Name of genus and species. rectrices. 
OQronhaps léphotes S22 200. 28: Se ec cee os 44 
Phlogeenas cruentata .......--+++--+-40-0+ 14 
OTUPUG ONE gs 35 oibjos dimen SM hn + pe Deine + 14 
Ptilopus (all species examined except one spe- 
cimen in Brit. Mus., marked P. occipitalis 2 , 
EI oe ee cava ap ela n Wes alc's * = 8 he 14 
Treron (all species examined) .......-...--- 14 
Zenaidura marginata .......----.++++-++-+- 14 
OEE a Es eee eee 16 
eS aaa Sas 16 
Phaps chaleoptera ......-----++--++++2+00- 16 
0S EES SS EE eee ear ins 16 
MUIR OMM GE arch t pis KNa Gh fin 6 aa 3 etm 8 6758 16 
Otidiphaps nobilis ......-.---.+- ee -eeeeeee 20 : 
It will be observed, as has been remarked by Prof. Baird, that, 
with the exception of Zenaidura, all the North American Columbe « 
possess 12 rectrices. 
Il. The presence or absence of the oil-gland in the genera of the Page 251. 
Columbee. 
The oil-gland is present in most of the Pigeons; it is very small 
in the genus Ptilopus. It need ype Di be remarked that, when pre- 
sent, it is never tufted. 
The oil-gland is present in all the specimens examined by me of 
Calenas, Metriopelia, 
Carpophaga, Ocyphaps, 
Chaleopelia, Phaps, 
Chalcophaps, Phlogenas, 
Chamepelia, Ptilopus (? in P. melano- 
Columba, - cephalus), 
Ectopistes, Pterocles, 
Geopelia, Turtur, 
Leptoptila, Tympanistria, 
Leucosarcia, Zenaida, 
Lopholemus, Zenaidura. 
Macropygia, 
The oil-gland is absent in all my specimens of 
Didunculus, Starnenas, 
Goura, Treron. 
