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



14. N. Anthracis Brun a. Cl. (1889). — V. lanceolate, acute. L. 0,o5 to 0,o6; B. 0,oi4 to 

 0,018 mm. Axial area unilateral. Central area also unilateral, but on opposite side to the axial 

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

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

 Japon p. 41 PI. V f. 6. N. Flattii Pant. HI PI. XXH f. 330 (1893). 



Fresh water (marine?): Japan, fossil! 



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

 B. 0,013 mm. Axial area narrow; central area orbicular. Striae 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 PI. V f. 1. N. alMnensis Grun. Pranz Jos. Land D. p. 103 PL 1 f. 29 (1884). 



Marine: Scotland! 



Original specimens of Donkins N. maculosa in Deby's Collection agree perfectly with origi- 

 nal specimens of G-runows N. alMnensis. 



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. Striae 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 punctata Kutz, Bac. p. 106 PI. 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 

 Strose Klieken PL I f. 10? 



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

 Iceland! Sweden (Malaren, Wenern, RingsjOn)! Finland! Gulf of Bothnia (Tornea, Pitea)! England! 

 Belgium (V. H.), Switzerland (Brun), Illinois! Fossil at Konigsberg! Klieken! Rostock! S:ta Flora! 



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

 different from those of other species of Naviculae. 



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

 L. 0,023 to 0,037; B. 0,oi to 0,oi2 mm. Axial area indistinct; central area distinct, orbicular. 

 Striae 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 Kara! Finmarken! Sweden (Malmo)! Holstein! Belgium 

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



Var. intermedia Grun. (1880). — V. lanceolate, with subcapitate ends. L. 0,o35 to 0,o4; 

 B. 0,00 7 mm. Striae 14 (middle) to 18 (ends), in the middle alternately longer and shorter, strongly 

 radiate, in the ends convergent. — iV. eryptocephala v. int. Grun. in V. H. Syn. PL VIII f. 10. 



Fresh water: Sweden, Ringsjon in Skane! New Zealand! 



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

 with N. notaiilis Pant. 



18. N. Bho Cl. N. Sp. — V. lanceolate, rostrate, obtuse. L. 0,115; B. O.oae mm. Axial 

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

 distinctly lineate (lineolae 25 in 0,oi 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. elcgans, but differs by the distinctly lineate striae. 



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. Striae 10 to 11 (12,5 Pant.) 



