268 



apical axis at right angles to the raphe. Terminal nodules at a 



little distance from the apices. No unilateral stigma. 



I have referred this species to Gomphonema on account of the form 

 being somewhat unsymmetrical with regard to the transapical axis and the 

 diflferently directed striæ at its apices, the hitter character in particular 

 appears to point to Gomphonema. Perhaps it comes nearest to G. angu- 

 statiim Kiitz. as according to Cleve (Syn. I p. 181) the unilateral stigma 

 of the latter is »indistinct«, and sometimes it even appears to be wanting. 

 Gfr. G. angustatiim var.? lapponica A. Cl. in A. Cl. Lule Lap., fig. 20. 



ANOMOEONEIS Pfltzer 1871. Cl. Syn. II, p. 5. 



74. Anomoeonels serians Bréb., V. H. Syn. tab. XII, fig. 7 and 

 Supl. B, fig. 31. 



75. A. brachysira (Bréb.) Grun., V. H. Syn. tab. XII, figs. 8 — 9. 



76. A. exilis (Kiitz.) Grun., V. H. Syn. tab. XII, figs. 11 — 12. 



Var. thermalis Grun., V. H. 1. c, fig. 10. 



The above species or varieties of A. serians are fairly common in 

 the material. Plankton. A variety which was found intermingled with 

 them agrees most closely with Van Heurck's fig. 12, but the capitate 

 apices shown in this figure are wanting. 



77. A. zellensis Grun., V. H. Syn. tab. XII, fig. 14. 

 Rather rare. Vaag iSjdero); Hojefjæld (Bord 6). 



NAVICULÆ HETEROSTICHÆ. Cl. Syn. II, p. 8. 



78. Navicula cocconeiformis Grun., V. H. Syn. tab. XIV, fig. 1. 

 Occurs in several of the gatherings, but rarely in any considerable 



quantity. 



NAVICULÆ LINEOLATÆ. Cl. Syn. II, p. 10. 



79. Navicula cryptocephala Kiitz., V. H. Syn. tab. VIII, fig. 5. 

 Here and there. 



Var. exilis Kiitz., V. H. 1. c, fig. 2. 

 Thorshavn (Stromo); Trangisvaag (Sydero). 



80. N. rhynchocephala Kiitz. var. amphiceros Kiitz., V. H. Syn. 

 tab. VII, fig. 30. 



Sand (San do). 



81. N. vipidula Kiitz., V. H. Syn. tab. VII, fig. 25. 

 Var. slesvlcensis Grun., V. H. 1. c, fig. 26. 



Var. rostellata Kiitz., V. H. 1. c, figs. 23—24. 



Not rare. The variety slesuicensis occurs more frequently than the 

 main species; I have found rostellata in gatherings from Midvaag (Vaag 6) 

 and Sand 6. 



