BLUE-GREEN ALGÆ FROM LAHORE AND SIMLA. 339 
17. LYNGBYA ÆSTUARII (Mert.), Liebm., Gom. Monog. Oscill. 1893, p. 127, 
pl. 3. figs. 1, 2. 
Diam. fil. 2 13-16 p ; diam. trich.= 10-13 a. 
Hab. Lahore, free-floating in a stagnant pool, intermingled with other 
alge ; September 1918. 
18. LYNGBYA PERELEGANS, Lemm., Abh. Nat. Ver. Brem. xvi. 1906, 
p. 255 ; xviii. p. 153, pl. 11. figs. 13, 14. 
Diam. fil.= 15-2 p ; diam. cell.= 1-175 w; long. cell. = 2-8 a. 
Hab. Lahore, adhering to the walls or to the submerged objects in the 
tanks of the Shalamar Gardens ; most of the year. 
19. LvxaByA Kasuvarir*, sp. n... (Pl. 81, fig. 5.) 
Strato expanso, obscure purpureo ; filamentis curvatis, densissime intri- 
catis ; vaginis firmis, crassis, obscure cæruleis vel purpureis, levibus, 
chitinosis ; trichomatibus tenuibus, ad genicula non-constrictis, 3-4 & crassis; 
artieulis quadratis, diametro brevioribus, protoplasmate grosse granuloso; 
dissepimentis haud granulosis, sæpe obliquis vel curvatis ; apicibus rotund- 
atis, non-capitatis ; calyptra nulla. 
Hab. Lahore, on moist greund which has been under water for some time, 
such as the drying tanks ef the Shalamar Gardens; August-April. 
This species resembles L. versicolor (Wartm.), Gom. and L. «rugineo- 
cerulea (Kütz.), Gom., but it differs from them in the colour of the stratum, 
in the coloured sheaths, and in the oblique or curved septa ; from the former 
it differs in the nature of the apex. 
20. LYNGBYA TRUNCICOLA, sp. n. (PI. 81. fig. 6.) 
Strato tenui, expanso, obscure æruginoso; filamentis rectis, plus minusve 
parallelis, 14-16 w crassis ; vaginis primum hyalinis et tenuibus deinde fuscis 
et firmissimis, non-lamellosis ; trichomatibus ærugineis, 12-14 u crassis, ad 
genieula haud constrictis ; articulis brevissimis, 3-4 uw longis, protoplasmate 
granuloso ; apieibus rotundatis, haud attenuatis; calyptra nulla ; dissepi- 
mentis non-granulatis. 
Hab. Lahore, on trunks of Acacia modesta, forming a thin stratum in 
association with Phormidium truncicola and Tolypothrix campylonemoides ; 
July-October. 
This species resembles L. æstuari very much in size and general appear- 
ance under the microscope, but differs from it in its peculiar habit, its 
non-attenuated apex, in having no calyptra, and in the non-lamellose sheath, 
though the latter is very firm when old. 
* This species is named after my esteemed teacher, Professor 5, R. Kashyap, M.Sc., B.A. 
(Cantab.), of the Government College, Lahore. 
