THE FOSSIL AVIFAUNA OF THE 
lU!) 
Chen hyperborea. 
Judging from the fossil remains of this (loose in tlie collection, it, to(j, must 
have been nearly as abundant in the region as the Canada (loose. I have deter- 
mined its existence there through a compardson of the specimens with Ijones oi 
Chen h. nivalis (No. 18,611 of the U. S. Nat. Mus.) It was no doubt identically 
the same species as exists over the same range at the present time. 
Equus Beds of Oregon : Specimens in the collection of Professor Co|X‘. 
CYGNIX.E. 
Olor paloregonus. 
This is the extinct Swan described by Professor Cope as Cygniis paloregonus, 
the description being based upon “ four tarso-metatarsi, two of which are nearly 
perfect It was a species rather larger than O. buccinator and .somewhat smaller 
than O. columbianus, that is judging from the ahove named bones. Apart from the 
skull and pelvis, its remains are represented in Cope’s collection by many lK)nes 
from a Humber of individuals. There are also several specimens in Professor 
Condon’s collection, including a humerus, wdiich unfortunately lacks a part ot 
either extremity. Osteologically, it differed but little from existing Swans, kdng 
probably most closely affined to Olor colimbianus. 1 have compared itslsmes witli 
the corresponding ones belonging to a skeleton of O. buccinator, a siH*cimen pre- 
sented to me several years ago by Mr. (1. Frean Morcom, of Chicago, and since 
placed by me in the U. S. National Museum (No. 18,5()!J.) 
Professor Cope’s paper contains full measurements of the tarso-metatarsi ol 
Olor paloregonus and to those I add the folhnving. given in millimetms. 
Length of humerus (restoration from tw'o individuals) 
.Millimetn*s. 
2!M» 
Length of ulna 
Length of carpo-metacarpus 
141 
Length of proximal phalanx of index digit 
110 
Length of femur . 
Length of coracoid (long axis) . . • ... 
!h 
Length of basal phalanx, mid.-anterior toe 
1)7 
“This Swan was discovered by Ex-Governor Whitaker, ot Oregon, in the 
Pliocene formation of that State. The same bird was afterward pnamivd by my 
assistant, Mr. C. H. Sternberg ”. (Cope.) _ _ 
To recapitulate, my investigations go to show that the following anserine forms 
occurred in the Pliocene (Eqnus Beds) of Oregon : — 
Lophodytes cuctdlatus. 
Anas base has. 
Anas americana. 
^mdem. pp. 388, 389. 
