in the deep coriico-humeral groove, somewhat lateral 

 position of the surface for the hrachialis anticus, and the 



FiK. 3. 



The palmar aspect of tie lel't hiiiuorus of a Picai-ian ; from the Quercy 

 Phosphorites. |. a, radial condyle ; b, ulnar ditto ; c, surface for 

 brachialis anticus. 



absence of an ectepicondylar tuberositj-. It differs, how- 

 ever, by the deeper tricipital fossa, and more especially 

 by the elongated form of the surface for the pectoralis 

 minor, which is placed entirely on the dorsal aspect. 

 Trof/on presents some approximation in these respects, 

 but the coraco-humeral groove is small, and the facet for 

 the pectoralis minor nearly circular. The specimen pro- 

 bably indicates an extinct genus. Purchased, 1884. 



A. 135. Two coracoids agreeing approximately in relative size with 

 the preceding specimen, and which may belong to the 

 same form ; from the Phosphorites of Bach. The sub- 

 clavicular process is well-developed and has no perfora- 

 tion. Purchased , 1884. 



Genus c. 



The humerus is somewhat larger than that of the iireccding form, 

 its length being 0,028, with a loss sharply defined surface for the 

 brachialis anticus, and otlier .slight differences of detail. 



