NATURAL HISTORY MISCELLANY. 53 
ers are killed, stranger drones are readily received; thus the deteri- 
oration of the race is prevented, : 
A BLACK VARIETY OF THE COMMON RED SQUIRREL, Sciurus Hudsoni- 
cus Pallas. I have lately obtained a black specimen of the common 
Red Squirrel. It was killed at Letang, New Brunswick, where neither 
the Grey, nor the common Black Squirrel are known to occur.—G. 
A. BOARDMAN 
— 0O 
GEOLOGY. 
Discovery or A HUMAN JAW IN A BELGIAN Boxk CAVE.— 
pont has discovered in the Bone Caves of Farfooz, near Dinant, in 
Belgium, a strange human jaw. It is the opinion of Sir. W. V. Guise, 
and Rey. W. S. Symonds, who have vince maid Bon locality, 
“That the AEEY i pe riod of the eutombmer nt of the an jaw, with the remains of 
the extinct animal hich it > may cae ed to the epoch known t 
geologists as the low f Prestw a period recent in a geological sense, 
but enorm cide oe Sh Diim measured Dy time, for ‘the cold oF the glacial epoch was not 
altogether passed, t was the period o 
the deposition of the old river drifts of Me nchecourt, near Abbeville, which contain their 
human flint implements, interbedded with the bones of the Mammoth and Rhinoceros; the 
period of the deposition of the ancient river beds near Salisbury, and other parts of Eng- 
land, which teach the same history; and also, they believe of the English bone caverns,”— 
The Reader, London, Sept. 1, 1866 
LIZARD- ENT FROM THE CHALK FORMATION OF ENGLAND. 
—Fossils indicating a creature of this character have been discovered 
by Mr. H. E. Seeley.— The Reader, London, Oct. 6, 1866. 
DISCOVERY OF GENUINE CHALK IN COLORADO AND Dacora.—“ Chalk 
of chalk, probably the only remainder of a mass which deindalici 
has ”—T. A. Conrad, Smithsonian Report, 1865. 
Dr. F. V. Hayden has also discovered in Yankton, Dacota Terri- 
tory, large deposits of a “ nearly white, soft chalk,” which “ will be 
found to 
to represent the White Chalk Beds of Europe, and be employed 
for similar economical purposes.”—Amer. Journal Science and Arts, 
Jan. 1867 
i +e 
CORRESPONDENCE. 
On THE PLUMAGE OF THE BLACK GuILLEMOT.—How does it 
that we find the Back ‘Guillemot (Uria grylle Lath.), in full black plu- 
mage all winter? All our works on Natural History tell us they change 
to white or grey in winter, but I often get specimens which are black 
in mid-winter. May it not be that only the young are light in winter? 
I can hardly think it possible some would remain black, and others 
change; I can see no difference between my dark winter and summer 
gpectinéns,—C. A. BOARDMAN, Milltown, Me. 
