Bats 
267 
south through the Rocky Mountains in British Columbia, Idaho, 
Montana, Wyoming, Utah, Colorado, and in the Sierra Nevadas in 
California. It is found in the Colorado mountains, and has been 
taken at Gold Hill, Cochetopa Pass, Boulder, Black Hawk, Crested 
Butte, Lake Moraine, and Coventry, the range in elevation being 
from 7,000 to over 10,000 feet. 
Habits. — The Water Shrew, as its name would indicate, is 
found mostly about water, along the shores of streams and 
ponds, and is as much at home in the water as on land, 
swimming well. Its food is the same as that of the other 
species. I know nothing as to its breeding habits. 
ORDER CHIROPTERA 
This order contains the Bats, mammals with the fore 
limbs modified for flight; the bones of the arms and the 
fingers are enormously elongated and support a flying 
membrane, the patagium; the ulna is rudimentary, the radius 
is long and curved, the wrist consists of six carpal bones 
supporting a short thumb (pollex) which is always free from 
the wing membrane and always bears a claw; the other four 
fingers are greatly elongated, and it is between these, the 
sides of the body, the hind limbs, and tail that the wing 
membrane is extended; the knee joint is directed outwards and 
somewhat backwards, owing to the rotation of the hind limb 
outward toward the wing membrane; from the inner side 
of the ankle joint arises a peculiar cartilaginous process 
(the calcar) directed inward along the interior margin of 
the accessory membrane of flight extending between the 
legs and usually embracing the tail (the interfemoral mem- 
brane), a small lobe of this membrane on the outer side of 
the calcar often present is termed the post-calcaneal lobe; 
another small portion of the wing membrane lying in front 
between the humerus and the radius is called the ante- 
brachial membrane; the ears which are often very large fre- 
quently have within the conch a peculiar upstanding process, 
