— 39 - 



Scalares V. H. I. c. p. HDl. 



60. IN. sealaris W. Sin. ciilV. V. H. Syn. tab. LX, fias. 14— 15. 

 Lem Dan (.") samples). In two of Die samples not rave. 



Area: Europe, Australia. 



The size of the present form agrees with fJiiiuow's var. iiiiiior (CI. i*o 

 Grun. arot. Dial p. 83) found in Delaware river and in lagoons at Samoa. 



Obtiis(F V. H. I.e. j). H97. 



61. ^. obtiisa W. Sm. var, nana Grun. V. H. Syn. tab. LXVII, fit>-.3. 



Lem Dan (4 sami)les). 



Area: the main species: Europe, America, Japan; var. lutvn only in 

 Haverfordwest (England) cnfr. V. H.'s types No. 399. 



Lanceolatw V. H. 1. c. p. 400. 



62. ^'. I'alea (Ktz.) W. Sm. forma major. V. H. Syn. tab. LXIX, 

 fig. 22 e. 



var. inlniita Bleisch. V. H. 1. c. fig. 23. 



var. teniiirostris Grun. V. H. I.e. fig. 31. 



var. debills (Ktz.) Grun. V. H. 1. c. figs. 28-29. 



Lem Dan (4 samples), Koli Samit. 



Area: tiie main species: Greenland, Europe, Abyssinia, Japan. 



63. N. intermedia Hanfzsch. V. H. Syn. tab. LXIX, fig. 10. 

 Koh Samit. 



Area: Europe. 



Nitschiella Rabenh. 18G4. V. H. Traile p. 404. 



64. N. longissima (Breb.) Ralfs. V. H. Syn. tab. LXX, fig. 8. 

 Lem Dan. A fragment only. 



Area: Greenland, Europe. 



Coccochromatic2e. 



Fragilaria Lyn-byo (1819). V. H. Traite p. 323. 



65. V. siamensis Ost. sp. nov. tab. nostr., fig. 19. 



L. 0,05—0,08 mm., B. in the middle O,003— 0,00;].5 mm., .=;tri?e 20 in 

 0,01 mm. Valve ronstricted in the middle and before the cai)itate 

 apices. Striae parallel, obscure, absent in the apices. I am not 

 able to see any pseudoraphe. 



This characteristic form, occurs in chains as Diatowa and Gravniia- 

 tophora. The endochrom is granulary. 



Klong Munse, Klong Son, Lem Dan. {h samples). 



