250 EUNST OsruLT. 



Lnnceolatæ Gnin. 

 Nitzschia fonticola Grun. var.V Tab. iiosl. XIV, lig. Ki. 

 Long. \'A n. Lal 4 /i. Punclis caiiiialibiis 11 — 12 in 10 /i. Slriis 

 inconspicuis. \'alva lanceolata, carena valde excentrica. 



Lo c. Ilvalrosoddc. 



Tilis small loiin may he allied lo A'/7:. foiilic. \. II. .Syn., Tab. L\L\, 

 lif,'s. Ki 17. 



Nitzschia Hantzschiana Rabli. Cl. Ä Grun. A. D., 99; V. H. Syn., 



Tab. LXL\, ligs. 12. 



Lo c. Vester Elv. 



.\rit. Dislr. Fz. .Is. Ld.. S|)l). 



Nitzschia Palea (Kütz) W. Sm. var. minuta Bleiscb.. Cl. & Grun. 



A. D., 96; V. H. Syn., Tab. LXL\, fig. 23. 



Lo c. Danmarks Havn (Algæ). 



Arct. Distr. E. Greenl., Fz. Js. Ld., J. M. 



Nitzschia Palea var. leniiirostris Grun.; V. H. Trt., 402, Tab. XVII, 



fig. 556 (the second figure). 



Lo c. Hvalrosodde. 

 Arct. Dislr. H. El., J. M. 



Arraphideæ. 



Ceratoneis Ehr., 1840. 



Ceratoneis Arcus Kütz.; V. H. Trt., 306, Tab. X, fig. 401. 



Lo c. Lille Snenæs. 



Arct. Distr. W. Greenl., E. (ireenl., Fz. .Is. Ld., Spb., B. El. 



Syiiedra Ebr, 1831. 



Synedra radians (Kütz.) Grun.; V. H. Trt., 312, Tab. X, fig. 423. 



L o c. Hvalrosodde. 



Not before recorded fi-om Arctic regions. Several other records. 



Synedra Ulna (Nitsch.) Ehr.? 



Lo c. Ilvalrosoddc, Koldewey Isl. (Algæ). 



I have only seen a few fraf>ments, so that an e.\act determination is 

 impossible. 



Synedra Vaucheriae Kütz. var. septentrionalis var. nova. Tab. 

 nost. XIV, fig. 19. 



Long. 23—30,«. Lat. 3,6«. Str. 16 in 10«, an punctatis? 



Valva lineari apicibus capitatis subcapitatisve. Striis parallelis, 

 altera in parte media valva deficientibus ibiqve areolam unilateralem 

 relinqventibus. 



Loc. Vester Elv (4 sampl.), Lille Snenæs. 



As this small species occurs in the samples both free and also attached 

 to the narrow branches of algæ, but never in the form of long bands, I 



