HYPOTHETICAL LIST. 737 
none have been preserved. We have been unable to find a Michigan 
specimen in any collection, and have been equally unsuccessful in finding 
an unquestionable record of its occurrence. Until something more definite 
can be shown it seems best to exclude it from the regular list. 
TECHNICAL DESCRIPTION. 
“Adult in winter: Above, blackish or slaty without white markings, the throat, fore- 
neck and entire under parts white. Tarsus shorter than middle toe without claw. Dis- 
tance from base of culmen to anterior point of loral feathers not greater than distance 
from latter point to anterior extremity of nostril. Length, 26 to 29 inches; wing, 12.15 
to 13.20; culmen 2.50 to 2.85; depth of bill at base .75 to .80” (Ridgway). 
Puffin. Fratercula arctica arctica (Linn.). (13) 
Included erroneously in some of the older lists, but there seems to be 
no reason whatever for its retention. It is an arctic or subarctic species 
common only along the seaboard and never found at any great distance 
from salt water. It is unsafe to say that its occurrence in Michigan waters 
is impossible but it is entirely improbable. 
Ancient Murrelet. Synthliboramphus antiquus (Gmel.). (21) 
Another bird for whosé presence in Michigan lists there is no warrant. 
A single straggler has been recorded from Wisconsin, and according to 
Cook, another was reported as taken on the Wisconsin shore of Lake 
Michigan, but we are unable to verify this statement. Certainly there 
is no Michigan record, and its capture is about as unlikely as that of the 
Puffin. Its home is along the shores and islands of the north Pacific. 
Black Guillemot. Cepphus grylle (Linn.). (27) 
Practically the same remarks apply to this species as to the preceding, 
except that so far as we can learn no specimen has ever been taken in 
any of the territory immediately adjoining Michigan. The “Black Guille- 
mots” recorded by Davidson from St. Clair Flats were Brunnich’s Murres 
(Bull. M. O. C. I, 8, 24). 
Murre. Uria troille (Linn.). (30) 
One or more supposed records of this species in all probability rest upon 
captures of the Thick-billed Murre (Brunnich’s Murre), Uria lomvia. 
There seems to be no good reason why one of these species should occur 
in some numbers and the other not at all, but such appears to be the fact. 
There is no valid Michigan record. 
Razor-billed Auk. Alca torda Linn. (32) 
Still another member of the family of Auks, Alcidz, which has been 
credited to Michigan, but evidently upon insufficient grounds. _ We know 
of no capture anywhere in the vicinity of Michigan. It is a sea bird strictly, 
and as unlikely to occur on the Great Lakes as the Puffin. 
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