183 
( 7 ) 
from Guanai, 9,000 specimens in all, was found one morning 
sunken with our boat under fifteen feet of water. From this 
point on down the Beni, the country rapidly assumes the char¬ 
acter of the Brazilian forest, with a dense tangle in the sombre 
shade below and a wealth of floral life high above upon the tree 
tops. The month of July was passed in journeying down this 
river and making occasional short stops to collect. At the junc¬ 
tion of this river with the Madre de Dios, the centre of the rub¬ 
ber production of that district, two months were spent, and the 
finest part of my collection was prepared. Just below this junc¬ 
tion begins the series of falls produced by the river’s cutting its 
way through a series of low hills. During the two months that 
were required to make the tedious transit of these falls, I had 
ample time to complete my collection with a handsome addition. 
Many of the Andean species with which we had already become 
familiar, here re-appeared. 
The entire collection includes somewhere about three thous¬ 
and numbers, of which an average of ten specimes were collected. 
THALLOPHYTA. 
(I.)—Diatoms. 
The following species were found by Prof. C. H. Kain in a 
gathering from Sorata, Bolivia :— Amphipleura Lindheimerii, 
Grun.; A pellucida , Kiitz.; Amphora ovalis, Kiitz.; Cocconema 
lanceolata , Ehr.; Cocconeis Pediculus, Ehr.; Cymbella stomato- 
phora, Grun.; Epithemia gibba, Kiitz.; and var. ventricosa, 
Gruti.; E. Argus, Kiitz.; Encyonema ventricosa , Kiitz.; Gonpho- 
nema constricta, Ehr.; Melosira varians , Ag.; Navicula elliptica, 
Kiitz.; N. tenella , Breb.; Pleurosigma Spencerii, W. Sm ; Suri- 
rella cardinalis, Kitton, rare; Synedra capitata, Ehr.; S. Ulna, 
Ehr.; and var. amphirhynchus, Ehr.; 5 . Crotonensis, Grun.; var. 
constricta, Kain, n. var,, a provisional name for what may be a 
new species. 
It is sometimes the case in this gathering that Amphipleura 
pellucida and A. Lindheimerii are both slightly sigmoid, so that 
they in some degree appear like Pleurosigmce . 
(II.)— Alg^:. 
Determined by Prof. W. G. Farlow. 
Coralina Chilensis, Dec., Tacna, Chili, and Pisco, (281, 282). 
