NO EYES, AND MULTIPLE EYES 203 
are armed with an array of sharp teeth, number¬ 
ing about thirty on either side. When adult 
the sexes may easily be distinguished the one 
from the other, the female being larger than the 
male and possessing a longer snout. 
Being a mammal and not a fish, the animal 
has to come to the surface of the water from 
time to time in order to inflate its lungs with 
air, the intervals of its respirations being about 
every half or three-quarters of a minute. 
Sometimes when thus engaged it will only rise 
sufficiently to expose its blowhole above water, 
but often it progresses in the manner of a 
porpoise, and during cold weather it will 
become so frisky as to leap right out of the 
water. 
Although one frequently hears the expression 
“ as blind as a bat,” it is hardly necessary to 
state that there is no truth in the epithet. 
Neither is the mole nor the legless lizard known 
as the blind-worm afflicted in this manner, in 
spite of popular belief. It is true there is a 
species of mole called the blind-mole (Talpa 
cceca), found in Italy, Dalmatia and Greece, 
and more rarely in Switzerland and the South 
of France, but this differs little from the common 
mole except that its tiny eyes are covered with 
a membraneous skin pierced with a minute 
hole which naturally renders the creature’s 
