the base of the gorge for the insertion of the anterior 

 articular ligament. The characteristic ridge on the 

 posterior trochlear surface is also very distinct. 



Walter Mantell Collection. Purchased, about 1855. 



Passeres of i-nceetain Ge>'ekic Position. 

 Genus a. 

 43879. The right humerus, wanting the jjroximal extremity, of a 

 bird somewhat larger than a Thrush ; from the Pleistocene 

 cavern-deposits of the Wellington YaUey, New South 

 Wales. 

 Presented hij tlie Trustees of the Australian Jluseuiu, 1871. 



Genus b. 

 40668. The distal extremity of the right humerus of a bird of the 

 approximate size of a Jackdaw ; from the Pleistocene of 

 Buenos Ayres. The characteristic features of the typical 

 Passeres are well displayed in this and the preceding 

 specimen. Bravard Collection. Purchased, 1854. 



40672. The distal portion of a right tibio-tarsus agreeing in relative 

 size with the preceding specimen: from Buenos Ajres. 



Bravard Collection. 



Gekus c. 

 E. 138. The right humerus of a bird of the size of a Thrush ; from 

 {Fiij.) the Phosphorites of Bach, near Lalbcnque (Lot), France. 

 This specimen (fig. 2) has a well-marked tricipital fossa, 



Fig. 2. 



The right bumeriis of a Passerine ; from the Queruy Phosjiborites. 

 a, radial coudyle ; '-, ulnar ditto ; c, surface fur bracliialis anticus. 



