tup: NATURALISTS' COMPANION. 
loC 
Three thousand species of Tertiary 
shells have been found in Amei ica. 
Bees appear for the first time during 
this period. 
Insects ot all kinds are numerous. 
The bones of a species ot whale, cal¬ 
led the ZEUGLODON are plentiful. 
Hundreds of fossil turtles are found 
in the rocks of this period. 
The remains of the hyena, dog, pan¬ 
ther, rhinoceros, tapir, horse, and num¬ 
erous other animals have been found in 
the beds of the “Bad I.ands,” on the 
White River, in the Upper Missouri re¬ 
gion and other places in the West. 
POST-TERTIARY PERIOD. 
QUATERNARY EPOCH. 
The Post-Tertiary Period is divided 
into three other periods, namely: 
(i) Glacial Period, (2) Champlain Peri¬ 
od, (3) Terrace Period. 
I. GLACIAL PERIOD. 
The continent of America, which be¬ 
gan by a V shaped strip of land, was 
now finished out very nearly to its 
present limits. 
The periods of fire and water have 
been; now comes the period of ice. 
The earth has until now had a tropical 
climate, but now comes a time of arctic 
winter 
'Uhe earth became covered with im¬ 
mense glaciers. These rolled slowly 
over the land, crushing ail that came 
in their way. But often large rocks 
and stones became fastened in them or 
fall upon them. These are carried along 
until the glacier melts and they are re¬ 
leased. In this manner stones, gravel, 
earth, etc., were transported from one 
place to another a long distance from it. 
This transported material is called 
drift. This drift includes all the loose 
imstratified deposits of gravel, sand,clay 
and stones which are so common in the 
Northern States. It extends south to 
the latitude of 39 o and west to the 
Rocky Mountains, d'he stones are of 
all sizes, from large holders weiuhiiiLr 
3,400 tons to small cobble-stones. 
11. CHAMPLAIN AND TERRACE PERIODS. 
Winter isover and spring is here, d'he 
glaciers feel the heat and melt before 
it. As the glaciers melt, the water has¬ 
tens in torrents to the ocean. 
Vegetation wakes ■ up again after the 
long winter. Animals appear in great 
numbers. The Mississippi valley is all 
one gigantic river rushing toward the 
Gulf of Mexico. Slowly the continent 
rises from the waters. The riveis dig 
deep channels in the soft deposit of the 
valleys, leaving their old channels high¬ 
er up, thus forming natural terraces. 
One can see these terraces on the banks 
of almost any large river. I'hese ter¬ 
race-plains are often the sites ofvillages, 
many of which owe their beauty to them. 
TO RE CONTINUED. 
The YoungOrnithologist has suspend¬ 
ed. Bro. Eds., Tis getting lonesome, 
but guess we wont follow suit; no, never. 
We have a number of fine articles,gen¬ 
erously contributed by our friends, for 
our May number. 
WANTED. We are at present en¬ 
gaged in compiling a Naturalists’ Hand¬ 
book, which, when complete, will con¬ 
tain full instructions for preserving and 
mounting all kinds of natural history 
specimens as well as various recipes use¬ 
ful to the naturalist. Persons possess¬ 
ing any directions for preparing speci¬ 
mens or recipes for making compositions 
will please send us the same with price, 
which if we accept, we will promptly 
remit. If you desire it returned in case 
we do not accept it or should already 
have the same, please inclose a 2c stamp. 
