261 



Var. lenticularis m. Fig. 29 ^^'^/i. å 



L. 0,018 mm., B. 0,005 mm. Valve lenticular. Apical area lj 



distinct; rather broad transpical fascia. Striæ veiy delicate, \!/ 



at right angles to the raphe. Fig. 29. 



This small species which appears in a gathering from Bosdalafos 



(Vaago) is undoubtedly related to Nav. fontinalis Grun. V. H. Syn. tab. 



XII, fig. 33 which P. T. Cleve (Syn. I p. 50) refers to Caloneis fasciata Lgst. 



6. C. Silicula Ehr. var. alpina Cl., V. H. Syn. tab. XII, fig. 21. 

 Var. gibberula Kiitz., V. H. 1. c, fig. 19. 



Var. ventricosa (Ehr.?) Donk., V. H. 1. c, fig. 24. 

 Found dispersed in the material, but not in considerable quantity 

 in any single gathering. The variety Tgibbenilai^ in Plankton. 



7. C. alpestris Greg., V. H. Syn. tab. XII, fig. 30. 

 Trangisvaag (Sydero). 



8. C. obtusa W. Sm., Donk. Br. D. tab. III, fig. 12. 



Trangisvaag (S yder 6). 



9. C. formosa Greg. var. holmiensis Cl., V. H. Syn. tab. XI, fig. 2. 

 Trangisvaag (Sydero). 



10. C. amphisbæna Bory var. subsalina Donk., V. H. Syn. tab. 

 XI, fig. 6. 



Rare (Hest 6). 



11. C. brevis Greg., V. H. Syn. tab. XI, figs. 18— 19. 

 Trangisvaag (Sydero). 



The form found by me stands with regard to its outline between 

 the two above-mentioned figures by Van Heurck, of which Cleve (Syn. I 

 p. 61) refers fig. 18 to the variety: vexans Grun. 



NEIDIUM Pfitzer 1871. Cl. Syn. I, p. 67. 



12. Neidium bisulcatum Lgst., A. S. All. tab. XLIX, fig. 15. 

 Here and there. Plankton. 



13. N. affine Ehr. var. amphirhynchus Ehr., A.S. Atl. tab. XLIX, 

 fig. 27. 



Here and there. 



Var. genuina Cl. formå minor, A. S. 1. c, fig. 23. 



Here and there. 



14. N. dubium Ehr., A. S. Atl. tab. XLIX, fig. 24. 

 Nels 6. 



DIPLONEIS Ehr. 1840. Cl. Syn. I, p. 76. 



15. Diploneis interrupta Kiitz., Lgst. Spetsb. tab. II, fig. 16. 

 Found dispersed, and usuall}' more isolated; not rare in a gathering 



from Trangisvaag. Plankton. 



