304 
THE SPCE OF BENI. 
and ChacTiacocha, breaks the latter chain ; and the point 
where the great river penetrates the mountains, is very 
remarkable. Entering the Amazon by the Eio Chamaya or 
Lniancabamba, I found opposite the confluence, the pictures- 
que mountain of Patachuana; but the rocks on both banks 
n between Tambillo andTomependa 
gat. 5 31, long. 80 56'). Prom thence to the Pono-o de 
Eentema, a long succession of rocks follow, of which the 
last IS the Poiigo de Tayouchouc, between the straitof Alan- 
seriche and the village of San Boija. The course of the 
Amazon, which is first directed north, then east, chan-^es 
near Puyaya three leagues north-cast of Tomependa. 
Ihroughout the whole distance between Tambillo and San 
Borja, the waters force a way, more or less narrow, across 
the sandstones of the Cordillera of Chachapovas. The 
mountains are lofty near the Embarcadero, at the confluence 
ol ttie Imasa, where large trees of cinchona, which mi^lit be 
easily transplanted to Cayenne, or the Canaries, approach 
the Amazon. The rocks in the famous strait of Manseriche 
are scarcely 40 toises high ; and further eastward, the last 
hills rise near Xeberos, towards the mouth of the Eio 
Iluallaga. 
I have not yet noticed tlie extraordinary widening of the 
Andes near the Apolobamba. The sources of the Ko Beni 
being found in the spur which stretches northward bevond 
the confluence of that river with the Apurimae, I shairgive 
to the whole group the name of “the spur of Beni ” The 
following is the most certain information I have obtained 
respecting those countries, from persons who had long inha- 
bited Apol^araba, the Eeal das Minas of Pasco, and the 
convent of Ocqia. Along the whole eastern chain of Titi- 
caca, from La Paz to the knot of Huanuco (lat. 1 74° to 104°) 
a very wide mountainous land is situated eastward, at the 
back of the declivity of the Andes. It is not a widening of 
the eastern chain itself, but rather of the smaU heights that 
surround the foot ol the Andes like a penumbra, filling the 
whole space between the Beni and the Pachitca. A diain 
of hills bounds the eastern bank of the Beni to lat. 8° • for 
the rivers Coanache and Magua, tributaries of the TJcavali 
(flowing in latitude 6° and 7°), come from a mountainous 
tract between the Ucayali and the Javari, The existence of 
