

NAVICULA. 



235 



Family: AOHNANTHACEiE 



Genus: Achnanthes Bory. 



216. Achnanthes sp 



Valves linear-lanceolate, with obtuse extremities, lateral margins 6nely unduly 

 with about 21-22 undulations from pole to pole. Ptri* coarse, about 9 in 10* 



Long. 66/* ; lat. 16* 



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



The only species of this genus with undulate or crenulate margin! are A. rrenulata Grua., 1*0 

 (vide Cleve, Synops. Navic. Diat. ii, p. 195 ; Le Diatoruiste, i, p. 50, t. 9, f. 3, A) and A. irtnp* 

 Ag. var mbcremdata Cleve, 1891 (Cleve, 1. o. ii, p. 193; Le Diatomiita, i, p.' 60, t. 9, f. 6, <;), 

 and the Burmese Diatom does not agree with either of them. We hop* to' enquire into this form 

 further at a future date. 



217. A. Hungarica Grun. (1863). 



Achnanthidium huntfarjcum Grun. Verh. 1863, p. 146, PI. 4, f. 8. 



Bab. — Between Thingan-nyi-naung and Kawkareik, in tb« -ide-cbannel of <i 



stream (No. 24483) 



Family: C0CC0N EIDAOEH. 



Genus: Cocconeis Ehrenb. 



218. Cocconeis Placentula Ehrenb. Infus. 1838, p. 194. 



Sab In stream, Lashio (No. 22557). Hsipaw (No. 24120). In the mountain! ea*t 



of Kawkareik (No. 24450). Myawadi (No. 24451). 



Family: NAVKJULACE£. 



Genus: Nauhula Bory 



219. Navicula nobilis (Ehrenb.) Kiitz 



Bab 



Mansang, near Hsipaw (No. 24193). In the] Kamgyi at Mudon 



24505) 



220 



Navicula major Kiitz. Bacill., p. 97, t. 4, f. 19. 

 Pinnularia major Rabenh.; Flor. Europ. Alg. i. p. 210 



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



221. N 



viridis Kiitz. Bacill., p. 97, t. 4, f. 18 

 Pinnularia viridis Rabenh. ; Flor. Europ. Alg. i, p 



212 



Hab.-ln swamp, Katha (No. 22677). Between Thingan-nyi-naung and Kaw 

 kareik, in the side-channel of a stream (No. 24483). 



