ANNOTATIONS AND ADDITIONS. 251 



half a degree too far to the north. Sir Robert Schomburgk 

 calls the last named river Rupununi, according to the pro- 

 nunciation of the Macusis ; he gives as synonymes of Rupu- 

 niri, Rupunuwini and Ooununy, the Carib tribes in these 

 districts having much difficulty in articulating the sound of 

 the letter r. The situation of Lake Amucu and its relations 

 to the Mahu (Maou) and Tacutu (Tacoto) are quite in 

 accordance with my map of Columbia in 1825. We agree 

 equally well respecting the latitude of the lake, which I gave 

 3 35', and which he finds to be 3 33' ; but the Carlo 

 Pirara, (Pirarara) which connects the Lake of Amucu with 

 the Rio Branco, flows from it to the north, instead of to the 

 west as I had supposed. The Sibarana of my map, of which 

 Hortsmann places the source near a fine mine of rock-crystal, 

 a little to the north of the Cerro Ucucuamo, is the Siparuni 

 of Schomburgk's map. His Waa-Ekuru is the Tavaricuru 

 of the Portuguese geographer Pontes Leme ; it is the tribu- 

 tary of the Rupunuri, which approaches nearest to fte 

 Lake of Amucu. 



The following remarks from the narrative of Robert 

 Schomburgk throw some light on the subject before us. 

 " The Lake of Amucu," says this traveller, " is incontestably 

 the nucleus of the Lake of Parime and the supposed White 

 Sea. When we visited it in December and January its 

 length scarcely amounted to a mile, and its surface was half 

 covered with reeds/' (This remark is found as early as 

 in D'Anville's map, in 1748.) " The Pirara issues from the 

 lake west north-west of the Indian village of Pirara, and falls 

 into the Maou or Mahu. The last named river, from such 



