•lUH 
KiiUUS IlKIW OF TIIK OUECION DESERT. 
Millimetres. 
107 
95 
62 
65 
75 
r.9 
of humeruH . • • • ’ ' 
lA'iifrtit of ulna 
U-iifTth of rariMMiutacnrpiia 
L iiKtli of f‘ «n«'’ * • • ■ ■ ‘ 
U-iifrtli of tarao-inetatarsua • • 
l 4 .njniutliiial iiii«l-vertical axis of coracoid 
The m-apuhf apntHl with tlH,He of Brania, and the left side of a specimen of its 
,t..n.um nUoL.\ it to seven facets upon that costal border. A sternum of 
Branta tanaiitHsis ( N«.. 1 ^^0 V. S. Nat. .Mus.) has eight hammpophysial facets upon 
fit her ctwtnl Umler. B. prop! tt qua jK)8.sessed an os furcula agreeing in fonn with 
that lame oa now fonml aiiiong our Hrant Geese. There is a specimen of it in the 
clhvlion nearly la-rfiM-t. IiidtH-d all the lx)nes of this species are in a beautiful 
(.late of |m-«T>ati»ii iiial many of them complete. Type Ixnie is the humerus 
nhiiwii in fig. 17, I’l. XV. 
Cilia* ('ollection: l’li<H*ene of Oregon. Silver Lake Region. 
IlmorrA ca>*ai>»:i‘»i". 
Niiinertnn* lames fmin various parts of the skeleton of the Canada Goost‘ am to 
la* ruiiinl in the eolliH’lion. some |H*rfect, sonic more or less so, and some fragmentary. 
.\ stinly of thes4* iiinl (Hiinparisons with the cori-e.sponding bones of a rt'cent skeleton 
of this Gimnm* (No. IS.fitUt V. S. Nat. .Mus.) convince me that the sjK'cies of the 
Ks|uus lhals an* iwti-ologically iilentioal with the existing species, or in other words, 
thet'iinnda (mh-si* which thrived during the later tertiary time of the western part 
of oar rout inent wen* similar to the Geese we now call Branta canadensis in onr 
Rvifimnn. 
The .'^waiis and (Jeew of that ancient time seem to have siilfered Iroin a 
laviilinr ilii*eas«* of the lames. It was confined to the superior angle of the jiollex 
inetnmr|ius of the enr|ai.nietaoarpus. It ajipeared to be of the natiii-e of a small, 
ltilM*iyulnt«‘4l exfoliation of the lame at that {Miint, and the evidences of it am to be 
w-en in many of the car|M>-inetacnri)i of those birds in the collection now under con- 
aidemtion.' Co|k. has almaily ixiinted out the fact that the remains of the Canada 
thaaa. .ax-iirriMl in the Kipius Ih*ds of Silver Lake (Bull. U. S. Geol. Surv. Terrs., 
1R7K. IV. p. .‘IStt.) 
Co|a. eolleetion: IMha-ene of Oregon (Silver and Fossil Lakes.) 
Aa«i a Ai.nirnoxM oamiiki.i. 
F...... ilT Vi- "'-r '"■'"K'd ""t tl.e f„ct of the c.-;istciice of this bird iu the 
I*7S I V."!' S- - 
The s|M>oiiiieiia am in his collection. 
