275 



133. P. nobilis Ehr., V. H. Syn. tab. V, lig. 2. 

 Here and there. 



134. P. streptoraphe CI. var.subconstricta m. Fig.39 ^*^Vi- 

 L. 0,102 mm., B., greatcst, 0,017 mm.; in tlie middle 



0,015 mm. Striæ 6 — 7 in 0,01 mm. 



Differs from the typical P. streptoraphe in being slightly 

 constricted in the middle. 



Nolso. 



135. P. isostauron (Ehr.?) Grun., Cl. & Grun. arc. D. 

 tab. I, lig. 14. 



Not common. Nolso. 



Fig. 39. 



Marinæ Cl. Syn. II, p. 94. 



136. Pinnularia cruciformis Donk. var. Færoensis m. 

 Fig. 40 660/1. 



L. 0,029 mm., L. 0,01 mm. Striæ 10 in 0,01 mm. 



Valve oval, almost linear; apices obtuse, truncate. 

 Striæ radiant in the middle, convergent towards the apices. 

 Transapical area rather broad. This variety comes nearest 

 to P. cruciformis Donk. var. brevior Cl. (Vega Exp. tab. 

 XXXV, fig. 18), but it is comparatively broader, more linear, 

 and the striæ are more distant. 



Arge (S trom 6); Trangisvaag (Syde ro). Fig. 4o 



P. sp. formå anormalis. Fig. 41 ^^Vi- 

 Found in a gathering from Nolso. 



AMPHORA Ehr. 1840. Cl. Syn. II, p. 99. 



137. Amphora ovalis Kiitz. var. libyca Ehr., V. H. Syn. 

 tab. I, fig. 2. 



Found in several of the gatherings, but always only in 

 small quantities. 



138. A. perpusilla Grun., V. H. Syn. tab. I, figs. 8—9. 

 Here and there. Fig.« 



Halamphora Cl. Syn. II, p. 117. 



139. Amphora acutiuscuia Kiitz., V. H. Syn. tab. I, fig. 18. 

 Rather rare. Trangisvaag (Sydero); Sand (Sand 6). 



140. A. Terroris Ehr., A. S. Atl. tab. XXV, fig. 18. 

 Rare. Trangisvaag (Sydero). 



18* 



