ChARADRIIDJE.] OSTEOLOGIA AVIUM. [CEdICNEMINJS. 



TlNOCHORUS, Escll. 



Escholtzii, Less. 



The anatomy of this bird was formerly described by me in the voyage of the Beagle. 

 The bones of the specimen are much damaged. 



Cranium similar to Attagis. The palatine bones destroyed. 



Sternum, which is perfect, also similar to Attagis in all particulars, except size. 



Furculum similar to Attagis ; as are also all the other bones. 



Measurements. 



Tenths. 



Length of humerus 12 



Length of ulna . 14 



Length of metacarpus ..... 8 



Length of femur 8 



Length of tibia 13 



Length of metatarsus 7 



Length of sternum 17 



Tenths. 



Breadth of posterior margin of sternum 9 

 Breadth of anterior margin of sternum 6 



Depth of keel 5 



Length of head 12 



Breadth of head 6 



Length of pelvis 11 



Breadth of pelvis 8| 



(Edicnemus, Vieill. 



Longirostris, Vieill. 



Cranium rounded ; a deep channel arising at the vertex is carried forward between 

 the orbits to the base of the nasal bones ; occiput narrow, ridge and muscular impres- 

 sions very distinct ; channel for the reception of the masseter muscles deep. Orbital 

 septum with three foramina. Palatine bones very broad, for two-thirds of their length 

 placed at an angle to the plane of the skull, the outer edges being lowest, the hinder 

 margin rounded; interarticular bones slightly twisted on their axis. 



Sternum of moderate size, with two small fissures on each side of the keel, on the 

 posterior margin ; keel deep, scolloped out on the anterior edge. Manubrial process 

 perpendicularly triangular at the base, tapering to an edge in front. 



Pelvis of moderate size, not differing from Chionis in form. 



Bibs of moderate size, styliform processes broad. 



Furculum with the rami flattened, much arched, and with very rudimentary process 

 at their junction. 



Coracoids short. 



Scapula of moderate breadth, pointed at its extremity. 



Wing-bones with the ulna much longer than the humerus. 



Leg-bones. Femur very short ; tibiae and metatarsi very long ; calyx rudimentary, 

 without any hind toe or spur. 

 178 



