272 RECORDS OF THE BOTANICAL SURVEY OF INDIA. 
COCCONEIDACEAE. 
Genus Cocconeis Ehrenb. 
27. ©. Placentula Ebr. Infus. 1838 
3 
& 
8 
& 
. N. stauroptera Grun. Van Heurck Synops. t. 5, f. 7. 
, p. 194. 
Hab. In the River Dihang under Rotung (37400). 
NAVICULACEAE. 
Genus Navicula Bory. 
N. lata Bréb. 
Var. latistriata (Greg.) Cl. Synops, II, p. 81. 
Hab. In shallow still water, Haflong, at 2,400 ft. (327 00). 
Var. Interrupta Cl. Synops. II p. 83; Van Heurek Synops. t. 6, f. 7. 
Hab. On the Mountain of Tonglu at 10,000 ft. (27737) ; in shallow 
still water at 2,400 ft., Haflong (32700) ; in ditch at edge of rice field 
near Sadiya, 400 ft. (32683). 
- N. breyirostrata Cl. Diat. Finl. p. 25, t.1, £ 5. 
Hab. In ditch at edge of rice field near Sadiya (32683). 
. N. acrosphaeria Bréb. Cl. Synops. II, p. 86. © 
Hab. In the Sipna Stream (31268). 
2. N. Brebissonia Kiitz. Van Heurck Synops. t. 5, £. 7. 
Hab. Near Kakarhatti (28842), 
- N. hemiptera Kiitz. Bacill. p. 97, t. 30, f. 11. (Pinnularia hemiptera — 
Rabenh. Cl. Synops. II, p. 85.) 
Hab. In ditch near Sadiya (32683), 
. N. radiosa Kiitz. 
Var. tenella (Bréb.) Van Heurck Synops. p. 84, t. 7, £. 21-22. : 
Hab. In stream about to dry up, Asirgarh Hill (31090) ; in the River 
Hab. On the Mountain of Tonglu at 10,000 ft. (27737). 
. N. exilis Grun Van Heurck Synops. t. 12, f. 11, 12. 
Hab. In shallow still water, Haflong, at 2,400 ft. (32700) ; in ditch by 
side of rice field near Sadiya (32683). 
N. Iridis 
Hab. In shallow still water, Haflong, at 2,400 ft. (32700) ; in the River 
between Puak and its tributary the Side River (37689). 
Var. amphigomphus Ehr. Van Heurck Synops. t..13, £. 2. 
Hab. Near Kakarhatti (28842). 
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