206 MESSRS. W. WEST AND G. S. WEST ON 
Genus EwNcvoNEMA, Kuetz. 
349. ENCYONEMA GRACILE, Rabenh. Süssw. Diat. p. 25, t. 10. 
Hab. Pond, Royal Botanical Gardens, Peradeniya. 
Family NAVICULEA. 
Genus SrAvROoNEIS, Ehrenb. 
350. STAURONEIS PHGNICENTERON, Ehrenb. Verbreit. v. fig. 1. 
Hab. Paddyfields, Henevatgodha. 
Genus Navicuna, Bory. 
351. NAVICULA MAJOR, Kuetz. Bacill. p. 97, t. 4. fig. 19. 
Hab. Paddyfields, Heneratgodha. 
952. NAVICULA VIRIDIS, Kuetz. /. c. p. 97, t. 4. fig. 18. 
Hab. Paddyfields, Heneratgodha. Rocks in Mahawelli Ganga. Muddy bottom of 
pool at foot of Hakgala Rock (altit. 6000 ft.). 
353. NAVICULA GIBBA, Kuetz. /. c. p. 98, t. 28. fig. 70. 
Hab. Paddyfields, Heneratgodha. Paddyfield between Kosgoda and Urahaighasma- 
hendai. Muddy bottom of pool at foot of Hakgala Rock (altit. 6000 ft.). 
354. NAVICULA BICAPITATA, Lagerstedt, Diat. Spetsb. 1873, p. 23, t. 1. fig. 5. 
Hab. In artificial tank, Peradeniya. 
355. NAVICULA APPENDICULATA, Kuetz. Bacill. p. 93, t. 3. fig. 28. 
Hab. Muddy bottom of pool at foot of Hakgala Rock (altit. 6000 ft.). 
356. NAVICULA GRACILIS, Kuetz. l. c. p. 91, t. 3. fig. 48. 
Hab. Running water, Royal Botanical Gardens, Peradeniya. 
357. NAVICULA MARINA, Ralfs, in Pritch. Infus. ed. iv. 1861, p. 903. 
Hab. Shallow pool, mangrove-swamp, Pandure. 
358. NAVICULA CUSPIDATA, Kuetz. Bacill. p. 94, t. 3. figs. 24, 37. 
Hab. In artificial tank, Peradeniya. 
359. NaAvICULA Ínrpis, Ehrenb. Verbreit. p. 130, t. 4. fig. 2. N. firma, W. Sm. Brit. 
Diat. i. p. 48, t. 16. fig. 138. 
Hab. Muddy bottom of pool at foot of Hakgala Rock (altit. 6000 ft.). 
Var. AMPHIRHYNCHUS, De Toni, Syll. Alg. ii. p. 154. 
Hab. Paddyfields, Heneratgodha, 
