258 Proceeding* of the Asiatic Society. [August, 



articulis subobsoletis viridescentibus. — Calcutta, natans in aqua stag- 

 nanto horti botanici. January, 1870. 



2603. Oscillaria ampliihia, Ag. — Howrah District, very frequent, 

 forming slippery layers of about | lin. thickness on brick stairs 

 leading to tanks, etc., also submerged or near the surface of the 

 -water. 



2664. Oscillaria Cortiana, Menegh. — Howrah District, in tanks, 

 etc. on the upper surface of waterplants. 



2665. Oedogonium scutatum, Kg. — Howrah District, in tanks, 

 on leaves of a species of Cryptocoryne. January, 1870. 



2666. Mastigonema granulation, Martens. — Filis fasciculatis, basi 

 coalitis, diametro ^io a ^ tJo curvatis, sensim attenuatis, vaginis 

 Kyalinis arctis, articulis inferioribus diametro duplo brevioribus, 

 pulchre granulatis, superioribus obsoletis fusco-a3rugineis. — How- 

 rah District, in tanks and slowly running waters, on the stems of 

 plants, especially of grasses. January, 1870. 



2667. Lynglya solitaris, Kg. — Howrah District, frequent in 

 tanks on dead or living plants. 



2671. Rivularia Lens, Menegh. — Howrah District, very frequent 

 in tanks on the leaves of Vallisneria. 



2672. Conferva bombycina, /?. crassior, Martens, articulis diame- 

 tro ( T *^ ad T |^ lin.) duplo ad quadruplum longioribus. — Calcut- 

 ta, Botanic Gardens, in tanks. January, 1870. 



2673. Mastigonema caespitosum, Kg. — Calcutta, Botanic Gardens, 

 on dead submerged stems of Sesbania paludosa. January, 1870. 



2674. Leptothrix subtil issima, Kg. — Howrah District, on moist 

 walls of buildings. (Grows, for instance, on the damp walls in the 

 Library Room of the Herbarium -building, Botanic Gardens.) 



2675. Scytonema Vieillardi, Martens. Strato compacto nigro, filis 

 subsimplicibus flexuosis acuminatis, cum vagina ^^ ad ^lo ^ m * 

 crassis, ©rugineis, vaginis luteis crassis. — Howrah District, on 

 walls, especially of waterworks, very frequent. 



X2. Oscillaria limosa, Ag. — Howrah, frequent in tanks. Janu- 

 ary, 1870. 



2024. Jlypoglossicm Bengalense, Martens. Fronde tenui purpurea 

 sesquilineam lata, alterne decomposito-pinnatinda, segmentis linea- 

 ribus denticiilatis, axillis acutis, donticulis obtusiusculis ; eostis 



