A New System for Preventing Collisions at Sea 



HEAD OF THE SPECKLED VAMPIRE BAT. 



In this bat, the principal organ projects from the nose. It will, however, be 

 noted that it has the rudiments of the wing-like leaf in its ear, which shows that 

 its early ancestors^belonged to the kind of bats that possess this leaf. This bat 

 does not depend so much upon its sixth sense as many other kinds of bats, but it 

 is provided with a fairly large pair of eyes. 



wv 



HEAD OF THE LESSER HORSESHOE BAT. 



It will be observed that this bat has extremely small eyes, and that the sensitive 

 membrane is attached to the nose and therefore cannot be considered a part 

 of the ear. 



THE BARBASTELLE. 



This bat is interesting from the fact that the organ of the sixth sense is located 

 inside of the ears, but there is also a sensitive spot at the tip of the nose. 



10 



