REVIEWS. 369 
difficult to tell them apart. Melospiza pon and Passcrella Townsendii 
occurred at Sitka. Corvus caurinus continues to be recognized as distinc 
from C. ossifragus. ‘The record of d omus Bairdii is the north-west- 
ernmost as yet; with this and Sclater's recent South American indication 
: it may be considered as an inhabitant of the western hemisphere at large, 
though it has yet to be detected in the Atlantic province; this, however, 
may be predicted with some confidence.  Bermnic AS) var. occid entails is 
Mr. Dall remarks that ** it " not at all unlikely that B. Hutchinsii and 
leopar are one species.” — The party were enabled to make specially 
interesting observations on some dici water fowl, not only of intrinsic 
value, I pos onstrating over again that many, and pro obably most birds, 
wever “rare” they may be usually considered through default of speci- 
mens or other fortuitous i yet have their ‘‘ metropolis ” 
n 
mon in the North Pacific, though not in Bering’s Sea. Larus argentatus 
(var.) and L. iraran are abundant on the Yukon. With the Rissa 
 tridactyla ** abundant at Sitka and Plover Bay," Mr. Dall has Ternen 
confounded, since a iei not E R. Kotzebui, a species, or perha 
a dev 
re same iiim p the dicen ‘in the color of the legs to which Mr. 
p 
red to yellow in vei nen pas dui We do not recolleet now which 
not rare at Plover Bay. Colymbus arcticus is recorded instead of C. Pa- 
cificus, which was to have ts ape eiie and the same may be said of 
Podiceps griseigena instead of P. Holboelli. The “rare” vie ees 
Loon ( Colymbus Adami: only recognized of late years, was got at 
ong the 
C 
The crested Synthli Si umizusume pip have jas anticipated; 
ut oniy S. antiquus is re 
Not less important pti Ns a of their geographical distribution, s 
Which we have only outlined some of the more salient points, is that o 
AMER. NATURALIST, VOL. IV. 4T 
