1870.] Proceedings of the Asiatic Society . 259 



segmentis oonformibus e multiplici serie cellularum elongatarum 

 compositis, cellulis frondis sexangularibus ^ lin. crassis ; sperniatiis 

 in superficie sparsis. — Lower Bengal, Mutlah, tidal. December, 1868. 



2026. Rhizoclonium Antillarum, Kg. — Lower Bengal, Mutlah, 

 brackish water. December, 1868. 



2687. Fischeria tenuis, Martens. Filis ramisque primariis subto- 

 rulosis tenuioribus, ramnlis z 3_- lin. crassis, acuminatis ; articulis 

 snperioribus diametro duplo longioribus. — Calcutta, Botanic Gar- 

 dens, on damp walls of the northern faces of buildings. Dull 

 orange-coloured, when fresh. January, 1870. 



Nearly allied to Fischeria thermalis, Schwabe, which grows on 

 walls exposed to the hot vapours of hot springs, as, for instance, at 

 Carlsbad, Bohemia. 



2705. Protoeoccus cohaerens, Kg.* Calcutta, very common on 

 walls of buildings, exposed to the weather. February, 1870. 



2707. Cladophora simpliciuscula, Kg. — Hooghly river near Kid- 

 derpore,. Calcutta, on old tidally submerged brick walls. February, 

 1870. 



2708. Hypoglossum Lepricurii, Kg. — Calcutta, occurring with 

 the last. 



2709. Scytonema aureum, Menegh. — 'Calcutta, on muddy banks 

 of the Hooghly river at the Botanic Gardens. February, 1870. 



2710. Chthonoblastus salinus, Kg. — Calcutta, Hooghly river near 

 Kidderpore, on an old brickwalls. February, 1870. 



2711. ITormosiphon coriaceus, Kg. — Hooghly river along the Bo- 

 tanic Gardens, Calcutta. February, 1870. 



2712. Conferva bomlycina, Kg. — Calcutta, Hooghly river near 

 Kidderpore. February, 1870. 



2713. Oscillaria tenuis, Juyngb.— Calcutta, Botanic Gardens, in 

 tanks. 



2714. Oscillaria antliaria, Martens. — Calcutta, on muddy banks 

 of the Hooghly river, Botanic Gardens. February, 1870. 



2715. Oscillaria tenuis y formosa, Bory.— Calcutta, Botanic Gar- 

 dens, in tanks. 



* This Alga is very frequent in Bengal ; hardly are the walls of buildings 

 ■white-washed, when they again turn first green and then black, being covered 

 by this Pretococcus. 



