CHAPTER XVII. 



UP THE RIO NEGRO. 



Interest of Dom Pedro — Wooding up a Rio Negro Steamer — At Teffe 

 — Fishes That Carry Young in Their Mouths — Collecting Plants 

 at P'onte Boa — Laboratory at Teffe — Remakarble Family of 

 Fishes — The Studis — Distribution of Fishes — Routine Work — 

 Floating Islands — Numerous New Species of Fishes. 



E fifth of September 

 Agassiz and his party 

 entered the Rio Negro, 

 and the trip was begun 

 with great enthusiasm 

 on the part of all. The 

 influence of the Em- 

 peror was felt even in 

 this out-of-the way sec- 

 tion of the country, a 

 steamer being placed at 

 their disposal by his or- 

 ders. Agassiz was more 

 than astonished at the variety and abundance of the 

 fishes found, and especially at the fact that they dif- 

 fered so in different localities not very far apart. To 

 the President of Para he wrote : I hasten to inform 

 you of the extraordinary success which continues to 



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