COCCONEMA. 



237 



Frustulia rhomboides (Ehrenb.) De Toni. 

 Var. saxonica (Rabenh.) G. S. West. 

 Frustulia sazonica Rabenh. 



Navicula crassinervia Br<Sb. in W. Sm. Brit. Diat. i, p. 4 

 Bab. — In ditch, Vizagapatam (No. 17916). 



i 



> 



t. 31, f. 271. 



Genus: Stauroneis Ehrenb. 



234. Stauroneis Phcenicenteron (Nitzsch) Ehrenb. 



Bab. — In the Kan-gyi at Mudon (No. 24505). 



235. Stauroneis akceps Ehrenb. 



Bab.— Momauk, east of Bhamo (No. 21551). Mansang, near Hsipaw. (No. 24193). 



Genus: Gyrosigma Hass. 



236. Gyrosigma acuminatum (Kiitz.) Grun. 



Hal.— Banks of the Irrawaddy at Bhamo (No. 21502). 



237. Gyrosigma Spencerii (Queck.) 0. K. 



Bab. — In the mountains east of Kawkareik (No. 24450) 



Family: G0MPH0NEMACE£. 



Genus: Gomphonema Ag. 



238. 



Bab 



In the 



Gomphonema intricatum Kiitz 



-Momauk, east of Bhamo (No. 

 •er Irrawaddy, Thayetmyo 



21551). 

 . 22999) 



Kyauktaga, Pegu district 



22124) 



Mansang, near Hsipaw (No. 24193) 



In the Kan-gyi at Mudon (No. 24505) 



239. 

 Bab 



Gomphonema tenellum 



Kiitz.; W. Sm. Brit. Diat. i, p. 80, t. 29, f 



243 



Minywa, Peg 



district (No. 21975) 



240. 

 Bab 



Gomphonema Augur Ehrenb. 



With the preceding species (No. 21975) 



Family : C0CC0NEMACE£. 

 Genus : Cocconema Ehrenb. 



4 



241 



Cocconema Ehrenbergii (Kiitz.) G. S. West 



Cymbella Ehrenbergii K 



ifc&.-Banks of the Irrawaddy and near the river, Bhamo (N 

 Myawadi (No. 24451). 



21502 and 21503) 



I 



