BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 1. N:0 13. 17 



bergen in many localities. Greenland. Navic. directa occurs in 

 almost all seas (ex. gr. Magellhaens Strait, West Indies, Ho- 

 nolulu etc). 



fi9. Navicula distans (Sm) {Pinimlaria distans Sm. Syn. 

 I, pag. 56, Pl. XVIII, fig. 169). Finmarken Grötsund. Spets- 

 bergen Kiugs Bay. Greenland in mud from great depths in 

 Davis Strait. 



N. distans lives on tlie Swedish and British coasts and, 

 according to Grunow, also in the Adriatic and Mediterranean 

 seas as well as near New Zeeland. 



70. Navicula fortis (Greg) Grun {Pinnul. fortis Greg. T. 

 M. S. IV, pag. 47, Pl. V, fig. 19. Nov. fortis Donk. Br. D. 

 Pl. VIII, fig. 8. Pinnularia constricta 0'Meara? M. J. N. S. 

 VII, pag. 117. T. \, fig. 8). Spetsbergen Brandwyns Bay. 

 Greenland. Seems to be a very widely distributed, but some- 

 what rare species. 



71. Navicula flanatica Grun (Verh. 1860, pag. 527, Pl. 

 I, fig. 9). Finmarken Grötsund very rare. Grunow discovered 

 tliis species in the Adriatic sea. 



72. Navicula lacustris Grun (Verh. 1860, pag. 534, Pl. I, 

 fig. 37). Spetsbergen Kings Bay (160 fths). Greenland. 



This form, which evidently is nearly related to Nav. per- 

 magna {Bail) Ealfs., has been found by Grunow in Neu- 

 ziedler Sea. 



Obs. The name N. lacustris was given by Gregory to 

 another species (M. J. IV pag. 6, Pl. I, fig. 23) and Mr. 

 0'Meara has proposed to name our species A*". GrunozcU (0'Meara 

 in litt.). 



73. Navicula liber Sm. (Syn. I, pag. 48, Pl. XVI, fig. 133). 

 Finmarken Grötsund. Spetsbergen Hackluyts. Greenland. 



Var. bicuneata Grun {Nav.'? bicuneata Cl. Ofvers. af K 

 Vet. Akad. Förh. 1868, pag. 227, Pl. IV, fig. 3 & 4). S2yets- 

 bergen Kings Bay (160 faths). 



Var. maxima Grun (Navicula maxima Greg). Spetsbergen 

 Kings Bay (160 fths). 



Nav. liber is a very common diatom in all seas. 



74. Navicula latissima Greg {Donk. Br. D. pag. 17, Pl. 

 III, fig. 2. Nav. gramdata Cl. Öfvers. af K. Vet. Akad. 



2 



