240 Ernst Østrup. 



Naviculæ heterostichæ Cl., 1895. 



Navicula cocconeiformis Greg., Cl. Syn., II, 9; V. H. Trt., Tab. 

 XXVII, fig. 779. 



Lo c. Vester Elv (5 sampl.). 



Arct. Distr. W. Greenl., E. Greenl., Spb., B. EL, J. M. 



Naviculæ lineolatæ CL, 1895. 



Navicula anglica Ralfs., Cl. Syn., II, 22; V. H. Trt., Tab. III, 

 fig. 136. 



Lo c. Danmarks Havn (Algæ). 



Not before recorded from Arctic regions. Several other records. 



Navicula anglica Ralfs forma elongata. Tab. nost. XIV, fig. 7. 



Long. 28^. Lat. 8 /i. Str. 11 in 10^, transverse lineatis. 



Valva elliptica, apicibus rostratis. Raphe area hyalina, mediam 

 valvam versus gradatim patescente, cincta. Striis radiantibus, media 

 in valva alternatim longis abbreviatisqve. Nodulis terminalibus 

 inconspicuis. 



Loc. Koldewey Isl. (Algæ). 



This form may be considered a somewhat narrow New. anglica. 



Navicula capitata CL, Cl. Diät. f. Fz. Js. Ld., 5, fig. 2. 

 Loc. Vester Elv, 

 Arct. Distr. Fz. Js. Ld. 



Navicula cincta Ehr., Cl. Syn., II, 16; V. H. Trt., Tab. Ill, fig. 105. 

 Loc. Off Cape Amélie (Algæ). 

 Arct. Distr. Fz. Js. Ld. 



Navicula dicephala (Ehr.?) W. Sm., Cl. Syn., II, 21; V. H. Tri., 

 Tab. III, fig. 138. 



Loc. Hvalrosodde (2 sampl.), Vester Elv. 

 Arct. Distr. J. M. 



Navicula falaisensis Grun., Cl. Syn., II, 21; V. H. Trt, Tab. V, 

 fig. 232. 



Loc. Off Cape Amélie (Algæ), Vester Elv. 

 Arct. Distr. W. Greenl. 



Navicula Gastrum Ehr., Cl. Syn., II, 22; V. H. Trt., Tab. III, 

 fig. 134. 



Loc. Off Germ. L. (Land-Ice), Marg. of the Pack-ice. 

 Arct. Distr. \V. Greenl., E. of Greenl. 



Navicula gracilis Ehr. var. obesa var. nova. Tab. nost XIV, fig. 8. 

 Long. 33 fji. Lat. 9 [2. Str. 11 in 10// transverse lineatis. 

 Valva elongate-elliptica apicibus rotundatis. Raphe area angusta 

 hyalina, media in valva in aream transapicalem dilatata, cincta. 



