1874.] 



ANATOMY OF THE COLUMB.E. 



259 



Division o. The oil-gland present, no gall-bladder. 

 Genus ChamcepeUa. 



American. 



> Old- World. 



Metriopelia. 



Zenaida. 



Zenaidura. 



Calcenas. 



Chalcopelia. 



Tympanistria. 



Ocyphaps. 



Leucosarcia. 



Phaps. 



Division /3. The oil-gland and gall-bladder present. 

 Genus Carpophaga. 



Division y. The accessory femoro-caudal muscle absent (it 

 being present in all other Columbae) ; the oil-gland and 

 gall-bladder present. 



Genus Lopholcemus. 

 Division §. The oil-gland and gall-bladder absent. 

 Genus Didunculus. 



Subfamily Treronin^:. 

 muscle. 



Columbidse wanting the ambiens 



Division a. With intestinal caeca and an oil-gland ; no gall- 

 bladder. 



Genus Phlogcenas. 



Division (3. With intestinal caeca, no gall-bladder, and no oil- 

 gland. 

 Genus Starncenas. 



Division y. With an oil-gland, no gall-bladder, and no intes- 

 tinal caeca. 

 Genus Geopelia. 



Division 2. With no intestinal caeca, no oil-gland (or a very 

 small one), and scutellated tarsi. 

 Genus Treron. 

 „ Ptilonopus. 



Division e. With no intestinal caeca, no oil-gland, no gall- 

 bladder, and tarsi reticulate. 

 Genus Goura. 



Family Pteroclid^e. Columbae in which the intestinal caeca 

 considerably exceed half an inch in length. 



Subfamily Pteroclin^e. Pteroclidae possessing the ambiens 

 muscle, a gall-bladder, and an oil-gland. 

 Genus Pterocles. 

 „ Syrrhaptes. 



