0. C. Marsh—Discovery of New Pierosauria. 243 
of an impression for the attachment of the anterior brachial 
muscle, as in the humerus of birds. The ulnar condyle is 
transversely oval in form, and is separated from the radial 
ifference of the two bones in size, they appear to resemble 
most nearly the anti-brachial bones of Pterodactylus Suevicus, as 
figured by Quenstedt.* With the above specimens were ex- 
rising in the groove of the distal end, either in the present speci- 
men, or in others of the same species. The outer trochlear sur- 
“Ace 1s most developed, and has its exterior margin angular. In 
joining shaft. The inner trochlear surface has a rounded inte- 
nor margin, and, on the anconal side, ends abruptly in a promi- 
hent ridge, which limits the lateral motion of the join 
There were four phalanges in the wing-finger, and the greater 
Portion of all of them is preserved. e first phalanx is almost 
* Ueber Pterodactylus Suevicus, 4to, Tibinge 1855. 
+ Fossil Reptilia rote crvenanoiastiadic Sepplement, pl. iv. 
