KONGT,. SV. VET. A KAOKMIKNS HANDLING AK. BAND 26. N:(i 2. 141 



10. N. iutegrii W. Sji. (18.56). — V. lanceolate-fUiptieal, iiiargiii;^ with ?> to 5 uiululal-.ion.s, 

 and rostrate-apieulate ends. L. (.),(>a7 to 0,():s; B. (),oo8 to 0,ouy mm. Axial area iiidistiiict, cen- 

 tral very small. Striie aboiit 2o in U,oi mm., more distant in the middle, slightly radiate at the 

 ends. — Finnidaria rostraia Greg. M. J. IV Pl. I f. 14 (1856). Finn. infcgra W. Sm. D. II p. 96. 

 JSfav. integra Ealfs. in Priteli. p 895 (1861). Donk. B. D. ]). 40 Pl. VI f. .s. (iiiUN. A. D. p. 36. 

 V. H. Syn. p. 96 Pl. XI f. 22. Cymbella integra A. S. Atl. Pl. LXXI f. 64-66. Staarondu 

 Janisehii Rabh. Alg. Enr. 848 (1859)? i 



Braekisli water: Holstein! England (W. Sm.), Belgium (V. H.). 



11. N. Lager^tedtii Cl. N. Sp. — V. linear with triundulated margins and broad, obtuse ends. 

 L. 0,028; B. 0,006 mm. Areas indistinct. StritB 11 (middle) to 15 (ends) in 0,0 1 mm. slightly 

 radiate, parallel at the ends. — Nav. ap. Lägst. Spitsb. D. p. 35 Pl. II f. 12 (1873). 



Fresh water; Spitsb. (Lägst.). 



12. N. siibtilissiiiia Cl. (1891). — V. linear, with capitate ends. L. 0,o;)2; B. 0,oo5 mm. 

 Axial area indistinet, central small. Stri;p about 40 to 45 in 0,oi mm. in the middle stronger, 

 more distant and more radiate; other striEe slightly radiate. — Cl. D. of Finl. p. 37 Pl. II f. 15. 

 Stauroneis Unearis Lagst. Spitsb. B. p. 37 Pl. II f. 13? 



Fresh water: Finland (Imandra Lappmark)! Sweden (Westerbotten, Degernäs)! Spitsbergen 

 (Lagst.). 



13. N. Kälfveiisis Grun. Ms. — V. linear with rounded ends. L. 0,02; B. 0, 005 mm. 

 Areas indistinct. Stri». 24 (middle) to 27 (ends) in 0, 01 mm. 



Fresh water: Kälfva, Ålands socken, Sweden, fossil (Grnn.). 



14. N. subinflata Grun. (1883). — V. linear, more or less gibbous in the middle, with 

 rounded ends. L. 0,o2!i to 0,04; B. 0,oo8 mm. Axial area indistinct, central small irregular. 

 StritB about 19 in 0,oi mm., almost parallel. The three or four median stritB are shorter and much 

 more distant than the others. Frustule in the zonal view rectangular; the coniiecting zone with 

 faint longitudinal lines. — Grun. in Cl. Vega p. 470 Pl. XXXVII f. 50. 



Marine: Cape V^ankarema! Arctic America! Norway, Grip! 



Var. dlipticu Cl. — V. elliptical with rounded ends. L. 0,035; B. 0,oi.3 mm. Stria?^ 20 

 in 0,01 mm. 



Marine: Adriatic (Cl. M. D. N:o 210). 



Naviculse Microstigmaticse Cl. 



Valve elongated, usually lanceolate to linear, never panduriform. Axial ai'ea narrow or in- 

 distinct. Central area small and rounded, or a transverse stauros. Structure: small, but distinct, 

 puncta arranged in parallel, or slightly radiate, transverse stritB, and undulating longitudinal 

 rows, the median transverse strife not alternately longer and shorter. connecting zone complex 

 or simple. 



This large section comprises a number of species, hitherto placed in Naricida, Stauroiieit:^ 

 Fleurostaitron, ScMzostauron and ScMzoncma. The may be classed in the following divisions: 



1. Stauroneis. Central nodule transversely dilated into a simple stauros. No diaphragms 

 at the ends of the valve. Connecting zone simple. 



2. Fleurostauron. Like Stauroneis, but with diaphragms at the ends of the valve. 



3. Schi2o.sta^iron. Central nodule transversely dilated into a furcate or bifid stauros. 



To jndge from the tigure. I have not seen any specimens in the material. 



