CHAPTER IV. 



IN SOUTHERN SEAS. 



The Log-Book Bahia Singular Appearance of the Water The 

 Vampire Bat Slavery Trips into the Country Rare Col- 

 lections In the Brazilian Forest Shooting Monkeys The 

 Click of a Butterfly Jumping Spiders Electrical Displays 

 The Plata. 



HE sea life of our young 

 hero was a time of con- 

 tinued activity. Every 

 moment when not com- 

 pletely incapacitated by 

 sea-sickness was devoted 

 to his studies, and to the 

 natural history log-book 

 which he was keeping. 

 From the stern of the 

 vessel he swung various 

 kinds of nets to entrap the 

 smaller forms of floating or pelagic animal life, while 

 fishing-lines were employed to capture rare and un- 

 known members of the finny tribe. A few miles from 

 Bahia, Darwin's attention was called to the strange 

 31 



