Ballidje.] 



OSTEOLOGIA AVIUM. 



[Rallinje. 



Wing-bones. Humerus nearly as long as the ulna. 



Leg- bones. Tibia very long ; calx small; a channel down the upper half of the 

 hind part of the leg ; supplementary metatarsal slightly twisted on its axis. 



Measurements. 



Tenths. 



Length of humerus ..... 17 



Length of ulna . 19 



Length of metacarpus 10 



Length of femur ....... 13 



Length of tibia 32 



Length of metatarsus 21 



Length of sternum ..... 17 



Tenths. 



Breadth of posterior margin of sternum 8 

 Breadth of anterior margin of sternum 6 



Depth of keel . 6 



Length of head . . . . . . . 22 



Breadth of head 7 



Length of pelvis 16 



Breadth of pelvis ...... 8 



Parr a, Linn. 



Melanoehloris, Vieill. 



I have only some fragments of this bird taken from a skin, but they appear to be 

 similar to the foregoing. 



Rallus, Linn, 



Aquatieus, Linn. 



Cranium with the occipital crest very slightly marked ; a triangular indentation at 

 the base of the nasal bones ; orbital septum very slight ; inferior maxillary bone with 

 a process pointing downwards below the condyles. 



Sternum long and narrow, with a narrow and deep fissure on each side of the keel, 

 the strip of bone bounding it projecting beyond the end of the keel. 



Pelvis similar to Parra. 



Furculum rather long, but very small and weak. 



Scapula narrow, pointed at the hinder extremity. 



Wing-bones. Ulna not so long as the humerus. 



Leg-bones. Metatarsus with a channel down the front ; calx small. 



Measurements. 



Tenths. 



Length of humerus ..... 16 



Length of ulna 12 



Length of metacarpus 8 



Length of femur ...... 16 



Length of tibia 27 



Length of metatarsus 18 



Length of sternum 19 



Tenths. 



Breadth of posterior margin of sternum 5 

 Breadth of anterior margin of sternum 4 

 Depth of keel ....... 5 



Length of head 28 



Breadth of head 6 



Length of pelvis ...... 16 



Breadth of pelvis 6 



199 



