OSTEOLOGIA AVIUM. 



[Theronin^. 



CoLUMBIDiE.] 



Turtur, Selby. 



Auritus, Ray. 

 I have the following species of this genus, all of which are similar to Columba, 

 except in size: — T. Erythrophrys and Tamboinensis. 



TreroNj Vieill. 



Aromatica, Gm. 



Cranium similar in shape to the foregoing pigeons ; the orhital septum perforated by 

 three small foramina ,• interarticular very small and weak, with a process on their 

 internal edge, which does not reach as far as the sphenoid bone. 



Sternum either with foramina on its hinder edge, or with the fissures nearly closed 

 by the expansion at the tip of the strips on their hinder ends ; anterior strip bounding 

 the large lateral foramen much expanded at its tip, most so in a downward and back- 

 ward direction. 



Remainder of the skeleton similar to Columba. 



Measurements. 



Tenths. 



Length of humerus ..... 13 



Length of ulna 17 



Length of metacarpus 10 



Length of femur 13 



Length of tibia 19 



Length of metatarsus 9 



Length of sternum 19 j 



Breadth of posterior margin of sternum 8 J 



Tenths. 



Breadth of anterior margin of sternum 7 



Depth of keel 7 



Length of head 18 



Breadth of head . ....'.: 7 



Length of pelvis ...... 21 



Breadth of pelvis anteriorly ... 10 



Breadth of pelvis posteriorly . . 11 



Ptilonopus, Sw. 



Cinctus, Temm. 



Does not differ from Treron, except that the keel is slightly narrower. Ptilonopus 

 melanocephalus is also similar. 



Illustrations. 



Palatine bones, metatarsus, pelvis, and sternum, Plate XXI. fig. % 



Phalacrotreron, Bp. 



Nudirostris, Sw. 



Not differing in any way from Treron. 



Illustrations: 

 Palatine bones, sternum, metatarsi, and pelvis, Plate XXI, fig. 1. 



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