KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 26. N:0 2. 131 



14. N. Szaboi Pant. (1889). — V. linear elliptical, with rounded ends. L. O.ia:); B. 0,u29 

 mm. Central area large, dilated outwards. StritB 12 in 0,oi mm. parallel, convergent at the ends, 

 punctate, puncta forming longitudinal rows. — Pant. II p. 54 Pl. VI f. 120. 



Brackish "water: Hungary fossil (Pant.). 



This species is unknown to me and I have placed it with some hesitation in this section 

 as it seems to be most nearly related to N. obliqua. 



15. N. Lagerlieiniii Cl. N. Sp. — V. rhomboid, very dilated in the middle. with truncate 

 ends. L. 0, 027 to 0,033; B. 0, 013 to 0, 01+ mm. Axial area very narrow; central area a broad 

 transverse fascia, reaching nearly to the margin, without an isolated punctum. Strise 18 in 0, 01 

 mm., radiate at the ends, coarselj^ pnnctate; pnneta abont 16 in 0, 01 mm. 



Fresh water (moist rocks): Ecuador, Pichincha! 



This species has the outline of Anonioeoneis FoUis and is remarkable for its large central 

 area. The central nodnle seems to be stanroid. 



16. N. bacilUforniis G-run. (1880). — V. linear, with broad, ronnded ends, freqnently some- 

 what gibbons in the middle and at the ends. L. 0, 032 to 0,045; B. 0,ou9 to 0, 01 mm. Central area 

 rectangular, half as broad as the valve. Striee 12 to 15 in 0, 01 mm. at the middle, 20 to 22 in 

 0,01 mm. at the ends, where they are radiate and curved. — GrEUN. A. D. p. 44 Pl. II f. 51. 

 V. H. S. Pl. XIII f. 11. Pant. III Pl. III f. 49. 



Fresh water: Norway. Dovre (Grun.), Finland! Anstralian Alps (Riewa Lagoons)! Ecnador! 



17. N. Pupiila KtiTZ. (1844). — V. linear, frequently gibbons in the middle, with broad, 

 rovmded or subtruncate ends. L. 0,022 to 0,037; B. 0, 007 to 0, 009 mm. Terminal nodules with 

 two lateral expansions. Central area about '/^ as broad as the valve, quadrate. Strise 13 to 15 

 in 0,01 mm. at the middle, 22 to 23 in 0, 01 mm. at the ends, radiate at the ends, verj^ finely 

 punctate. — KtJTZ. Bac. p. 93 Pl. XXX f. 40. N. Fnp. var. genuina GtRUN. A. D. p. 45 Pl. II 

 f. 53. V. H. Syn. p. 106 Pl. XIII f 15, 16. StauroneU WittrocMi Ldt. Spitsb. D. p. 38 Pl. II 

 f. 15 (1873) (perhaps N. bacill iformis). Sfauroneis tatrica Gutwinsky Mat. fl. Galicyi 1890 p. 24 

 Pl. I f. 20 (perhaps N. bacilliformis)? Schizostimron? tatric. De Toni Notarisia 1890 p. 196. 



Fresh water: Spitzbergen! Sweden! Finland! Norway! Belgium! England! Bengal! Austra- 

 lian Alps! Japan! New Zealand! Sandwicli Islands! South Africa! Greenland! Kansas! Argentina! 

 Ecuador! 



Var. redanciularis Greg. (1854). — V. linear with broad, subrostrate ends. — Sfauroneis 

 rectangularis Greg. M. J. II Pl. IV f. 17. N. Fup. v. rect. Grdn. A. D. p. 45. 



Fresh water: Scotland (Greg.). 



Var. baciUaroides Grcn. (1880). — V. linear with rounded ends. — Grun. A. D. p. 45. 



Naviculse Entoleise Cl. 



Valve symmetrical, linear-lanceolate or fusiform to elliptical, rarely constricted. Median 

 line with somewhat distant central pores, Axial and central areas combined in a more or less 

 broad, lanceolate space. StritB fine, tinely punctate, radiate at the ends. Connecting zone not 

 complex. 



This section comprises forms in some respects intermediate between those of the sections Nav. 

 microstigmaticee and Nav. Icevi.striatce. Some of them appear to be related to the Nav. fu,siformes, 

 but differ in the more distant central pores and in the axial area. 



The species of this section partly inhabit fresh, and partly salt water. Some of the small 

 fresh-water species usually grow in iilaments, and are then called Biadesmis. 



s 



