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 : — Amphiplettra Lindheinierii, 

 Grun.; A pellucida, Kutz.; Amphora ovalis, Kiitz.; Cocconema 

 lanceolata, Ehr.; Cocconeis Pediciilus, Ehr.; Cymbella stomato- 

 phora, Grun.; Epithemia gibha, Kiitz.; and var. veniricosa, 

 Grun.; E. Argus, Kiitz.; Ejicyoiiema ventricosa, Kiitz.; Gonpho- 

 7iema constricta, Ehr.; Melosira varians, Ag.; Naviaila elliptica, 

 Kiitz.; N. tejiella, Breb.; Pleiirosigma Spencerii, W. Sm ; Suri- 

 rellacardinalis, 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 Amphipleiira 

 pellucida and A. Lindheinierii are both slightly sigmoid, so that 

 they in some degree appear like PleurosigmcB. 



(II.)— Alg^. 



Determined by Prof. W. G. Farlow. 

 Coralina Chilensis, Dec, Tacna, Chili, and Pisco, (281, 282). 



