EASTERN ETHIOPIA 
XVII 
216 
entering the windpipe, although the mouth may be 
filled with it. 
When swimming, the body of the crocodile is sub¬ 
merged ; the parts which remain above the water are the 
snout and upper parts of the head, with the eyes and 
ear-lids. The powerful tail is a very efficient swimming 
organ. If alarmed when swimming the crocodile sinks 
and may remain submerged a long time. The keeper of 
the reptile house at the London Zoo” assures me that 
these reptiles will lie completely submerged in the tank 
Teeth of a Crocodile. 
A. An old M^orn-oiit tooth about to be shed. 
B. A tooth in use with its successor lying in the 
pulp chamber. 
C. A tooth in its prime. 
for half an hour. Visitors often call his attention to a 
crocodile lying immovable at the bottom of the tank be¬ 
lieving it to be dead, and will not be satisfied until he has 
roused it with a rod. One crocodile has lived in the 
Zoological Gardens thirty-four years. 
The crocodile is well furnished with teeth : they are 
implanted in deep sockets along the margins of the 
upper and lower jaws. The teeth vary in shape and in 
number in different species of crocodiles, but they are 
