KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 27. N:0 3, 19 



14. N. Anthracis Brun a. Cl. (1889). — V. lanceolate, acute. L. 0,o.5 to 0,06; B. 0,oi4 to 

 0.018 mm. Axial area unilateral. Central area also nnilateral, bnt on opposite side to the axial 

 area and connected with a narrow longitudinal area. Strise 7 (middle) to 8 (ends)inO,oi mm. ra- 

 diate in the middle, transverse at the ends, coarsely lineate; lineolse 20 in 0,oi mm. — D. f. du 

 Japon p. 41 Pl. V f. 6. N. Flattii Pant. Hl Pl. XXII f. 330 (1893). 



Fresh water (marina?): Japan, fossil! 



15. N. macniosa Donk. (1871). — V. broadly linear, with apiculate ends. L. 0,04 5 to0,o68; 

 B. 0,0)3 mm. Axial area narrow; central area orbicular. Strise 10 in 0,oi mm. radiate in the 

 middle, transverse at the ends, finely lineate, crossed by two undulating, narrow, lateral areas. 

 — B. D. p. 25 Pl. V f. 1. N. alhinensis Grun. Franz Jos. Land D. p. 103 Pl. 1 f. 29 (1884). 



Marine: Scotland! 



Original specimens of Donkins A"", maculosa in Deby's CoUection agree perfectly with origi- 

 nal specimens of Grunows JSf. alhinensis. 



16. N. tascula Ehb. (1840). — V. elliptical, with protracted, capitate ends. L. 0,05; B. 0,oi5 

 mm. Axial area narrow; central area large, transverse, subrectangular. Strite 12 to 14 in 0,oi mm. 

 radiate in the middle, transverse at the ends, very finely lineate and crossed by several irregu- 

 larly undulating longitudinal bands. — Pinnularia tuscula Ehb. Ber. 1840. Stauroptera tuscula 

 Ehb. M. g. VI: i f. 13 a. Stauroneis pimctata KtJTZ. Bac. p. 106 Pl. XXI f. 9 (1844). W. Sm. 

 B. D. I Pl. XIX f. 189. Donk. B. D. p. 36 Pl. V f. 12. Navicula tuscula V. H. Syn. p. 95 Pl. X 

 f. 14. Stauroneis meniscus Schum. Preuss. D. p. 189 Pl. IX f. 54 (1862)? Navic. tumida var. subsasla 

 Ströse Klieken Pl. I f. 10? 



Fresh or slightly brackish water (larger lakes): Spitsbergen (Lägst.), Beeren Eiland (Lägst.), 

 Zeeland! Sweden (Mälaren, Wenern, Ringsjön)! Finland! Gulf of Bothnia (Torneå, Piteå)! England! 

 Belgium (V. H.), Switzerland (Brun), Illinois! Fossil at Königsberg! Klieken! Rostock! S:taFiora! 



According to Grunow (F. D. Öst. Ung. p. 145) the cell-contents of Nav. tuscula are very 

 diiferent from those of other species of Naviculse. 



17. N. Salmai'iim Grun. (1880). — V. elliptic-lanceolate, with protracted, capitate ends. 

 L. 0,023 to 0,037; B. 0,oi to 0, 012 mm. Axial area indistinct; central area distinct, orbicular. 

 Strise 14 to 16 in 0,oi mm., distinctly lineate, in the middle strongly radiate and alternately 

 longer and shorter, in the ends transverse. — A. D. p. 33 Pl. II f. 34. V. H. Syn. p. 82 Pl. VIII 

 f. 9. N. Carassius Grun. Verh. 1860 p. 537 Pl. III f. 31; Pl. IV f. 11. 



Brackish water: Spitsbergen! Sea of Kära! Finmarken! Sweden (Malmö)! Holstein! Belgium 

 (V. H.), England! Saxony! Neusiedlersee, Hungary (Grun.). 



Var. intermedia Grun. (1880). — V. lanceolate, with subcapitate ends. L. 0,03 5 to 0,o4; 

 B. 0,0 7 mm. Strise 14 (middle) to 18 (ends), in the middle alternately longer and shorter, strongly 

 radiate, in the ends convergent. — N. cryptocepJiala v. int. Grun. in V. H. Syn. Pl. VIII f. 10. 



Fresh water: Sweden, Ringsjön in Skåne! New Zealand! 



By the var. intermedia is N. Salinarum connected with forms of N. cryptocepJiala as well as 

 with N. notabilis Pant. 



18. N. Rho Cl. N. Sp. — V. lanceolate, rostrate, obtuse. L. 0,115; B. 0,02 6 mm. Axial 

 area very narrow, in the middle dilated into a large orbicular central area. Strise 11 in 0, 01 mm., 

 distinctly lineate (lineolse 25 in 0, 01 mm.), in the middle strongly radiate and alternately longer 

 and shorter, in the ends transverse. — Part. I Pl. III f. 35. 



Mouth of rivers: China, Canton River! 



This species resembles N. elegans, but differs by the distinctly lineate strise. 



19. N. notabilis Pant. (1889). — V. lanceolate, acute. L. 0,04 to 0,o56; B. 0,oo9 to 0,012 

 mm. Axial area indistinct; central area small, somewhat transverse. Strise 10 to 11 (12,5 Pant.) 



