oo he et ere 
_- that of some of the Saccoderm 
FRESHWATER ALGAE FROM INDIA. — 276: 
fm 
NITZSCHIACEAE, 
Genus Nitzschia Hass. 
or 
=a 
. N. linearis (Ag.) S. Sm. ; 
Hab. In the River Dihang under Rotung (37400). 
58. N. sinuata (W. Sm.) Grun. 
Var. Tabellaria Grun. Van Heurck Synops. t. 60, f. 12, 18. f ; 
Hab. In the River Dihang between Puak and its tributary the Side 
River (37689). 
_N. amphibia Grun. Van Heurck Synops. t. 68, f. 15-17. 
Hab. With the preceding species (31345) ; in the Sipna stream (31268) ; 
in running stream, near base of the hill, Chandni (31099). 
oOo 
Yo} 
Genus Hantzschia Grun. 
,16, PI. 11, fig. 15. 
60. H. Amphioxys (Ehr.) Grun. Pl. t 5. 
glu (24918, 27737) ; from the River 
Hab. From the Mountain of Ton: 
Dihang under Rotung (37 400). 
Zygosporae quadratae, membrana a 
sata. Long. sine pr. 18-40 p, cum pr. 97-58 p ; lat. 19-26 p. 
In no. 27737, this diatom was quite frequent in the conjugat 
The zygote was more or less quadrate, with a greenish hyaline membrane 
conspicuously prolonged. and thickened at the corners. These peg-like pro- 
d angulos multa producta et incras- 
i ; j auxos- 
accompanied by a conspicuous increase ™ formation of - 
pores by conjugation, and the zygote eared 
Desmids. In some cases, however, the cha- 
racteristic form and markings of the Diatom could be recognised on the ar 
of the conjugating cells, 80 that there could be no doubt whatever a8 to 1" 
identity. 
SURIRELLACEAE. 
Genus Surirella Turp-. 
£61. S. apiculata W. Sm. Schmidt’s Atlas t- 25, £. 34, 35- 
Hab. near Kakarhatti (28842). 
