TltlNGIDiE.] OSTEOLOGIA AVIUM. [TRINGINJ5. 



Charadrius, Linn. 



Pluralis, Linn. 

 Similar to the foregoing, but devoid of the hind toe. I have also specimens of 

 Charadrius praticula, Vociferus, Melodus, and Rufipes, all of which are also similar. 



Squatarola, Cuv. 



Helvetica, Linn. 

 Generally similar to Vanellus, but with the furculum not so much arched at the 

 junction of the rami, and the palatine bones not nearly so wide. 



Hoplopterus, Bon. 



Spinosus, Linn. 

 Similar to Charadrius, but having longer legs, and a large spur on point of the wing. 



Cinclus, Moehr. 



Interpres, Linn. 



Cranium. Occipital ridges well marked. Orbital septum with one large foramen. 

 Palatine bones damaged, but apparently similar to Charadrius ; no channel between 

 the orbits. 



Sternum rather large for the size of the bird, with two fissures on each side of the 

 keel, on the posterior margin, the outer one largest, the inner one very small, almost 

 rudimentary, the strip of bone bounding the outer fissure extending nearly as far as 

 the hinder margin of the sternum ; keel deep, anterior edge scolloped out. Manubrial 

 process small, bifid. 



Pelvis similar to Charadrius. 



Furculum similar to Charadrius, but the rami not so much expanded at their 

 junction. 



Coracoids short. 



Scapula not much arched, sharply pointed at its extremity. 



Leg-bones. Metatarsus with a hind toe ; calx rudimentary. 



Measurements. 



Tenths. 



Length of humerus ..... 15 



Length of ulna 17 



Length of metacarpus .... 5 



Length of femur 12 



Length of tibia 19 



Length of metatarsus ..... 10 



Length of sternum 16 



Tenths. 



Breadth of posterior margin of sternum 8J 

 Breadth of anterior margin of sternum 7 



Depth of keel 5| 



Length of head 19 



Breadth of head 6j 



Length of pelvis 17 



Breadth of pelvis ...... 10 



2p 181 



