128 peoe. g. dickie on alg.e ebom 



Chboococcace^:. 

 Miceoctstis oliyacea, Kuetz. Moist places near Obydos; 

 near Esaltacion, Rio Madeira; and Porto Salvo, Rio Purus. 



M. CJ3EULEA, n. sp. Thallo membranaceo, caoruleo ; familiis 

 globosis, diam. -006 ; cellulis sphsericis, diam. -00002- - 00005. 

 In Rio Tapajos, in small bays after heavy rain. 



M. lobata, n. sp. Thallo plus minus irregulariter lobato ; 

 cellulis sphsericis, diam. *0002; cytioplasmate colore lsete virente. 



Forming a green layer on the surface of the water of Rio 

 Tapajos. 



Aphanocapsa membbanacea, Babenh. ? Appears to be iden- 

 tical with the European plant found at Mentone. In a deposit of 

 mud from the Mauhes river, 6° 30' S. lat. 



Desmidie-E. 

 My friend Mr. John Roy, one of our local microscopists, made 

 this list of species detected by him in various materials from the 

 Amazons region. He stated that there are at least as many new, 

 which remain for future description. In the following list 

 " Purus" refers to pools in a sandbank on the margin of the river 

 Purus, in 65° 22' W. long, and 7° 35' S. lat. " Montealegre " 

 refers to Lago Paxusara near Montealegre. 



Spondyeium pulchellum, Archer. Montealegre. 

 Gonatozygon Ralesii, Be Bary. Montealegre. 



Miceastebias euecata, Balfs. This differs slightly from the 

 British form, but agrees with that recorded by Nordstedt. 

 Near Montealegre. 



M. cettx-melitensis, JEhrenb. Montealegre. 



M. xaticeps, NorA. Montealegre. 



M. didymacantha, Naeg. Montealegre. 



Euastbttm CUHEATUM, Jenner. Purus. 



E. sinttosttm, Lenorm. Montealegre. 



E. qitadbatum, Nord. Near Para. 



CosHAsrcM obnatum, Balfs. Montealegre. 



C. Botbttis, Bory. Montealegre. 



