273 



115. P. diversa m. Fig. 37 ^''Vi- 

 L. 0,039 mm., B. 0,006 mm. Striæ 15 in 0,01 mm. 

 Valve narrow, rhombic-lanceolale. Striæ radiant, but about 



midway between the centre and tbe apices suddenly conver- 

 gent. Tbe apical area dilated towards the middle and liere 

 forming a transapical fascia. This species undoubtedly comes 

 very near to tbe form — witbout name — from »Grim Brigs f'« 37. 

 Aberdeen« figured in A. S. Atlas tab. 44, fig. 52, but its striæ are 

 closer. 



Rare. Vidcrejde (Videro). 



Distantes Cl. Syn. II, p. 80. 



116. Pinnularia intermedia Lgst., Lgst. Spetsb. tab. I, fig. 3. 

 Here and there, but never in any considerable quantity. 



117. P. Balfourlana Grun., Cl. Syn. II, tab. 1, fig. 18. 



Not common. Trangisvaag (Sy de ro); Ejde (Oste ro); Hojefjæld 

 (Bord 6). 



118. P. borealis Ebr., V. H. Syn. tab. VI, fig. 3. 

 Scattered about in the material. 



119. P. lata Bréb., W.Sm. Syn. tab.XVIII, fig. 167. 



Not rare, but never in large quantity in any of the 

 gatherings. 



In fig. 38 i^^'^/i) I have figured a fragment of P. lata 

 which is distinguished by its size and linear form. For, 

 while P. lata (cfr. Cl. Syn. II, p. 81) is said to attain a 

 length of 0,13 mm., the specimen in question would when 

 complete measure at least 0,192 mm. Unfortunately I 

 have only succeeded in finding this incomplete specimen; 

 it occurred in a gathering from Kvanhaugen (Sydero. 



120. P. alpina W.Sm., Donk. Br. Diat. tab. IV, 



fig. 6. 



Found dispersed in the gatherings as the preceding 

 species, but not in great numbers. Plankton. 



Fig. 38. 



Tabellarieæ Cl. Syn. II, p. 81. 



121. Pinnularia stauroptera Grun., Donk. Br. Diat. tab. XII, fig. 3. 

 Trangisvaag, Kvalbo (Sy der 6); Hojvig (S trom 6). 



Var. interrupta Cl., V. H. Syn. tab. VI, figs. 6—7. 

 Næs (Oste ro); Kirkebokamp (S trom 6). 



122. P. stomatophora Grun., A. S. Atl. tab. XLIV, figs. 27-29. 

 Found dispersed, but not rare. 



Botany o( the Færoes 18 



