208 Ens ST ØsTUui'. 



Navicula superba Cl., var. siihnciild Gran. A. S. AU., Tab. CCLIX, 



ligs. 27- 28. 



I,oc-. M;uj^. of llie l'ack-Ice. 

 .\r(t. Di sir. ICiisl Ard. S. 



Navicula transitans Cl., Cl. Syn., Il, 27; Cl. Vega Exp., Tab. 

 XXXVI, lig. ;31. 



Lo c. Pack-Ice, Marg. ol' llie Pack-Icc (.'5 sampl.). 

 Arct. Distr. W. (irecnl., 1{. ol" (Ircenl., Kast Arct. S. 



Navicula trigonocephala Cl., Cl. Syn., II, 27; Cl. Vega p]xp.. 

 Tab. XXXVI, lig. 29. 



Lo c. Pack-Ice, Marg. of the Pack-ice (4 sampl.). 

 Arct. Distr. W. Green!., E. of Greenl., Hast Arct. S. 



Navicula valida Cl.i&Grun., Cl. Syn., II, 25; Cl. et Grun. A.D., 



Tab. II, lig. 29. 



Lo c. Marg. of the Pack-Ice. 



Arct. Distr. E. Greenl., E. of Greenl., East Arct. S. 



Navicula valida Cl. & Grun., forma minor. Tab. nost XIII, fig. 8. 



Long. 40«. LaL 16/i. Str. 8 in 10;/, transverse lineatis. 



Valva elongate-eliiplica. Raphe area distincta hyalina cincta. 



Striis radiantibus, media in parte valvæ allernatim longis abbre- 



viatisqve. 



Loc. Marg. of the Pack-Ice. 



Undoubtedly a narrower and smaller form, intermediate between Xav. 

 valida and Nav. valida minuta (Cl. 1. c). 



Navicula Zostereti Grun., Cl. Syn., II, 31 ; A. S. Atl., Tab. XLVII, 



figs. 42—44. 



Loc. Oft' Cape Amélie (Algæ , Koldewey Isl. (Algæ), Marg. of the Pack- 

 ice (3 sampl.). 



Arct. Distr. E. of Greenl. 



Navicula? gomphonemoides sp. nova. Tab. nost XIII, fig. 7. 



Long. 32 fx. Lat. 5//. Str. 10 in 10 fi, delicatissime punctatis. 



Valva anguste-lanceolata. Raphe leniter sinuosa. Striis radian- 

 tibus, Raphen attingentibus, media modo in parte valvæ paululum 

 abbreviatis. Nodulis terminalibus inconspicuis. 



Loc. Danmarks Havn (Algæ). 



This small form mav perhai^s be a Gomphonema. Only a single specimen 

 found. 



Naviculæ punctatæ Cl., 1895. 



Navicula Baculus CL, Cl. Vega Exp., 474, Tab. XXXVII, fig 51 

 (cf. Cl. Syn., I, 124: Stenoneis inconspicua (Greg) Cl. var. Baculus 

 Cl.). A. S. Atl., Tab. CCLXII, fig. 13. 



Loc. Marg. of the Pack-Ice. 



Arct. Distr. E. of Greenl., East Arct. S. 



