Diatoms from North-East Greenland. 249 



Tropidoraphideæ. 



Hantzschia Grun., 1877. 



Hantzschia amphioxys (Ehr.) Grun., V. H. Trt., 381, Tab. XV, 



fig. 483 b. 



Loc. Lille Snenæs (2 sampl.), Thermometerfjeld. 



Ar c t. Di Str. W. Greenl., E. Greenl., Fz. Js. Ld., Spb., B. El., J. M. 



Hantzschia aniphioxys (Ehr.) var. leptocephala Øst., Øst.,. 

 Ferskv. d. f. Østg., 276, Tab. I, fig. 8. 



Loc. Hvalrosodde (3 sampl.), Lille Snenæ.s, Vester Elv, Thermometerfjeld. 

 A ret. Dis tr. E. Greenl. 



Hantzschia amphioxys (Ehr.) var. robasta var. nova. Tab. 

 nost. XIV, fig. 17. 



Long. 176«. Lat. \ôju. Punct. carinal. 4 — 5 in 10 /z. Str. 15 in 

 10 fx, punctatis. 



Valva hantzschoidea, apicibus rostratis. Punctis carinaHbus 

 paululum in valvam prolongatis. Nodulo centrali eximie conspicuo. 



Loc. Hvalrosodde. 



Nitzschia (Hass., 1845, W. Sm.), Grun., 1880. 



Dubiæ. 

 Nitzschia Nathorstii Brun, Brun, J. M. & E. Greenl., 9, Tab. 11,^ 

 fig. 5. 



Loc. Hvalrosodde, Lille Snenæs. 

 Arct. Distr. Fz. .Is. Ld., .1. M. 



Nitzschia thermalis (Kiitz.) Grun. var. intermedia Grun. V. H. 



Trt., 389, Tab. XV, fig. 510. 



Loc. OfF Cape Amélie (Algæ). 



Not before recorded from Arctic regions. Other record. Ard. Liég. 

 (V. H. Trt. 1. c.j. 



Griinoivia. 



Nitzschia Denticula Grun., V. H. Trt., 390, Tab. 15, fig. 514. 



Loc. Hvalrosodde. 



Arct. Distr. W. Greenl., E. Greenl., Spb. 



Obtusæ. 

 Nitzschia subcapitata sp. nova. Tab. nost. XIV, fig. 18. 

 Long. 94/^. Lat. 4 fx. Punct. carinal. 8 in lO/j. Str. delicatissimis. 

 Valva fere lineari, apices subcapitatos versus unilateraliter atte- 

 nuate. Nodulo centrali obscuro, an præsente? 

 Loc. Vester Elv. 



