126 PROF. G. DICKIE OX ALG.E FBOM 



Sph^eozyga osctllaeioibes, Kuetz. Barreiras de Hyutana- 

 ham, Bio Purus ; also at Prainha. 



Anab^na gigak"tea, Woods. Pools near Obydos. 



A. scabba, n. sp. Libere natans, eserulea ; trichomatibus cur- 

 vatis, articulis sphsericis, scabris, diam. - 0004. Rio Tapajos at 

 Santarem. 



Prof. Trail notes that " the water requires to be strained before 

 drinking, being very full of Algae of a light blue-green colour; 

 patches several yards in extent are constantly floating in the 

 stream." 



A. chilensis, Mont. At Sao Paulo, Eio Solimoes. 



A. bullosa, Kuetz. Moist places in the forest at Porto Salvo, 

 Eio Purus ; and swamps at Sao Paulo. 



Ctlinobospebmum eipabitjm, Kuetz. ? Probably identical with 

 the species widely diffused in Europe. Various places, Eio Purus, 

 Eio Madeira, Eio Sapo, at the mouth of Eio Jutahi. 



C. c^ebuleum, n. sp. Trichomatibus subrectis, cseruleis, sequa- 

 libus, intricatis, articulis ellipticis (diam. "0002 unc), ad geni- 

 cula plus minus constrictis, homogeneis ; sporis ellipticis, maturi- 

 tate fuscis, diam. '0008 unc. 



Surface of moist sandy clay at Barreiras de Hyutanaham, and 

 moist places in the forest at Porto Salvo, Eio Purus. 



C. janthotjm, n. sp. Trichomatibus plus minus curvatis, 

 moniliformibus, in stratum janthinum intricatis, articulis sphae- 

 ricis, diam. "0002. Sporis ? Along with the last. 



OsCILLABIACE.E. 



Inactis OBscuBA,n. sp. Phycomatibus numerosis, minutis, in 

 crustam continuam ferrugineam aggregates, fibris diam. "0002. 



On moist soft sandstone at Caxoeira grande, Manaos, and at 

 Caxoeira de Taruma. 



I. fascicuiata, Grunoio? Continuous crusts on dripping 

 sandstone rock at Caxoeira de Taruma. 



Hybbocoleum theemale, Kuetz. ? In clear stream at Igarape 

 de Manaos. 



