J. A. Allen—Fossil Passerine Bird from Colorado. 388 
One of the specimens affords the following measurements : 
Inches. Inches. 
Humerus, length. .-..--.. 0°80} Middle toe and claw-_-..-- 0°6 
Forearm, length....--- . 0°95 | Claw alone AG: 020 
Manus, length --....----- 1°02 | Hind toe and claw-..---- 0°37 
Coracoid, length---- .---- 0°72 | Claw alone Fie IS 
Clavicle, length_--.--.--- 063; Wing .2css ue cl ol) 80 
een, WenOth. 22 sce 1:00 | Tail (approximate) -....... 2 
mareus, length. .: ... 2... 0°60 | Total length (approximate) 6°85 
The bones still rest in the original matrix, and, being some- 
what crushed and flattened, do not admit of detailed descrip- 
tion and comparison with other types. e furculum is well 
Another specimen from the same locality, and probably 
representing the same species, consists of the tip of the tail 
and about the apical third of a half-expanded wing. (Fig.2.) In 
The larger specimen, first described, is divided into an 
upper and a lower half, the greater part, however, adhering to 
