KONGL. sv. vi<:t. akadhmiens iiandlixgar. rand 26. n:o 2. i;-51 



14. N. Szaboi Pant. (1H89). — V. linear elliptical, with rounded ends. L. 0,123; B. 0,o29 

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

 punctate, puncta forming longitudinal rows. — Pant. II p. 54 PI. 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. ohliqua. 



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

 ends. L. 0,027 to 0,033; B. 0,oi3 to O.ow mm. Axial area very narrow; central area a broad 

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

 mm., radiate at the ends, coarsely punctate; puncta about 16 in 0,oi mm. 



Fresh water (moist rocks): Ecuador, Pichincha! 



This species has the outline of Auomoconcis Follis and is remarkable for its large central 

 area. The central nodule seems to be stauroid. 



16. N. bacillifonnis Grun. (1880). — V. linear, with broad, rounded ends, frequently some- 

 what gibbous in the middle and at the ends. L. 0,o32 to 0,045; B. 0,oo9 toO,oi mm. Central area 

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

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

 V. H. S. PI. XIII f. 11. Pant. Ill PL III f. 49. 



Fresh water: Norway. Dovre (Grun.), Finland! Australian Alps (Riewa Lagoons)! Ecuador! 



17. N. Piipula KiJTZ. (1844). — V. linear, frequently gibbous in the middle, with broad, 

 rounded or subtruncate ends. L. 0,022 to 0,037; B. 0,oo7 to 0,oo9 mm. Terminal nodules with 

 two lateral expansions. Central area about '/o as broad as the valve, quadrate. Stria- 13 to 15 

 in 0,01 mm. at the middle, 22 to 23 in O.oi mm. at the ends, radiate at the ends, very finely 

 punctate. — KtJTZ. Bac. p. 93 PI. XXX f. 40. N. Fnp. var. gcnuina Grun. A. D. p. 45 PI. II 

 f. 53. V. H. Syn. p. 106 PI. XIII f. 15, 16. Staurond^ Witfrockn Ldt. Spitsb. I), p. 38 PI. II 

 f. 15 (1873) (perhaps N. bacilliformis). Stauroneis fafrica Gutwinsky Mat. 11. Galicyi 1890 p. 24 

 PI. I f. 20 (perhaps N. bacilliformis)? Schizosiauron? 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. redangularis Greg. (1854). - V. linear with broad, subrostrate ends. ■ — Stauroneis 

 rectangularis Greg. M. J. II PI. IV f. 17. N. Pup. v. red. Grun. A. D. p. 45. 



Fresh water: Scotland (Greg.). 



Var. bacillaroides Grun. (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. Stria' fine, finely punctate, radiate at the ends. Connecting zone not 

 complex. 



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

 micro.sfif/niaficce and Xav. loivistriafce. Some of them appear to be related to the Nov. fnaiformes, 

 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 filaments, and are then called Diadesmis. 



