APPENDIX. 533 



VI. SKETCH OF SEPARATE JOURNEYS UNDER- 

 TAKEN BY DIFFERENT MEMBERS OF THE 

 EXPEDITION. 



It is not possible for me to give here at length the narrative of 

 the separate journeys undertaken by my young companions. To do 

 them any justice, their reports should be illustrated by the accom- 

 panying maps, geological sections, &c, which are more appropriate 

 in a special scientific account. I trust that I shall hereafter find 

 resources for publishing all these materials in a fitting manner ; 

 but, in the mean while, I should do a wrong to my own feelings as 

 well as to my assistants, did I not add to this volume such a sketch 

 Of their separate work as will show with how much energy, perse- 

 verance, and intelligence they carried out the instructions I had 

 given them. It will be remembered by the reader that one object 

 was kept constantly in view throughout this expedition, namely, 

 that of ascertaining how the fresh-water fishes are distributed 

 throughout the great river-systems of Brazil. All the independent 

 journeys, of which short sketches are given in this summary, were 

 laid out with reference to this idea; the whole expedition being, 

 in fact, a unit so far as its purpose and general plan were concerned. 

 In this sense my own exploration, and those of all my assistants, 

 belong together, as parts of one connected scheme. 



That detachment of the party which was conducted by Mr. 

 Orestes St. John left Rio de Janeiro on the 9th of June, 1865. 

 This company consisted of Messrs. St. John, Allen, Ward, and 

 Sceva. The first two were to reach the Atlantic coast by way of 

 the Rio San Francisco and the Rio Paranahyba ; while Mr. Ward 

 was to descend the Tocantins to the Amazons, and Mr. Sceva to 

 remain for some time in the fossiliferous region about Lagoa Sancta 

 for the purpose of collecting. As far as Juiz de Fora they followed 



