BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 1. N:0 13. 23 



Length of the frustule (= breadth of the filament) 0,0 2 4 

 ra.m., breadth 0,oo48 m.m. 



The cells occur iinited iuto long lilaments, which are found 

 floatino- on the surface of the sea together with Thalassosira, 

 Chtetocerse, Rhizosolenia etc. In the cells there seems to occur 

 the same reprodviction of interiör cells as is known to be the 

 case with Himanthidium Soleirolii. 



Pl. 4, fig. 25 a F. Y. b S. V. 



116. Raphoneis (Dimerogramma) öuarnerensis Grun (Verh. 

 1862, pag. 381, Pl. VII, fig. 24) var. major n. var. Costae 16 

 in 0,0 2 5 m.m. Length 0,0 5 m.m. Spetsbergen Brandwyns Bay. 

 Greenland. Finmarken. The costae are more distant than on 

 specimens from the Adriatic Sea (20 — 24 in 0,oi" according 

 to Grunow). 



Pl. IV, fig. 26. 



117. Grammonema striatula (Lyngb.) Ag {Fragilaria stria- 

 tnla Sm Syn. II, pag. 23, Pl. XXXV, fig. 298). Spetsbergen. 

 Greenland. 



118. Sfcriatella unipunctata (Lyngb) Sm (Syn. II, pag. 37, 

 Pl. XXXIX, fig. 307). Spetsbergen Kings Bay. Finmarken 

 Grötsund. 



119. Striatella Chilensis Grun (Novara pag. 96, Pl. I A, 

 fig. 1 a, b, c). Greenhuid very rare. 



120. Grammatophora Oceanica Ehb. Grunow {Gr. maci- 

 lenta Sm. Syn. II, pag. 43, Pl. LXI, fig. 382). Spetsbergen 

 Kings Bay (160 faths). Finmarken Grötsund. This species, 

 which in most seas is one of the most common, is rare in 

 the arctic sea and has not boen observed from Greenland. 



121. Grammatophora arctica Cl (Ofvers. K. Vet. Akad. 

 Förh. 1867, pag. 664, Pl. XXIII, fig. 1) Spetsbergen common. 

 Greenland common. Finmarken rare. 



122. Grammatophora arcuata Ehb. {Grun. Verh. 1862 pag. 

 420, Pl. XI, fig. 7). Spetsbergen Schoal Point, Treurenberg 

 Bay, Hinlopen Strait. GreenUnid. 



