946 28 
Freshwater Diatoms 
by E. Ostrup — Copenhagen. 
(With plate L) 
The following list of freshwater Diatoms has resulted from the 
examination of 33 samples collected by the Danish expedition to 
Siam (1899-1900). Of these 33 samples two only contained no 
Diatoms; the localities of the remaining 31 samples are: 
Koh Chang: Klong Son ........... 2 samples 
ee Leh Dat ie ete ga ade 16 Fa 
x Klong Munsé .... ... 5 . 
5 Klong Majum......... 9 a 
P Klong Prao..... cates, Cdl # 
Klong Sarlakpet....... 1 - 
Naval station opposite Koh Kong... 1 » 
Kob. Sanit. y24-c0pc65 Gomes rene 1 . 
Lent N¢OD sess eseeaee seuss esas wee ga m 
Placochromatice. 
Caloneis Cl., Syn. I, p. 46. 
1. (. faseiata Lgst.? tab. nostr., fig. 1. 
L. 0,028 mm., B. 0,006 mm., striae in the middle at least 25 in 
0,01 mm. denser towards the apices. 
Strie radiate. The apical area dilated towards the middle 
and here forming a transapical fascia. 
Solitary in a sample from Lem Dan. 
With some doubt I have referred this small form to Cal. fase. Lest. 
because the strie are more radiate and because I am not sure, that J 
have seen the longitudinal lines. 
Area: Cal. fase.: ubiquitous. 
