KONOL. SV, VKT. AKADKMIKNS IIANDLlNCiAK. BAND 26. Nto 2. 137 



3. N. Rioj(P Cl. (1881). — V. elliptical, with ronnded onds. L. 0,06 to 0,o7; B. 0,()2.'? 

 to U,024 mill. Median line in a thick .silicious ril), coiiilnning tlie large central nodule with 

 the thick terminal nodules. Terminal fissures slightly curved. Axial and central area united 

 in a linear space very .slightly dilated in the middle. Stride 17 (middle) to lit (ends) in 0,01 mm., 

 radiate throughout, indi.stinctly punctate, crossed by a shallow, longitudinal depression. — Cl. D. 

 fr. Gronl. and Argentina p. 12"^ PI. XVI f. 2. 



Fresh water: Argentina (Sierra Famatina)! 



4. N. Bacillimi Eiib. (1843). — V. linear with rounded ends. L. 0,0:^5 to 0,or)r); B. 0,oi to 

 0,015 mm. Median line in a thick siliceous rib. Axial area narrow slightly enlarged around the 

 central nodule and expanded at the ends on each side to the full width of the valve. Striae 14 

 (middle) to 20 (ends) very slightly radiate. — Ehb. Am. PI. IV: -,, f. 8. Grun. A. D. p. 44 PI. II 

 f. 50. V. H. Svn. p. 10") PI. XIII f. 8. Strose Kliecken f. 8. N. Uvissimo Donk. B. D. p. 28 

 PI. V f. 2 1871?" 



Fresh water: Sweden (Skane)! Finland! Siberia, Mouth of . I enissey (Grun.), North Australia! 

 New Zealand! 



Var.? mcxiccuHi Grun. (1880). — V. gibbons in the middle. L. OjO."-); B. 0,oi mm. Terminal 

 nodules larger; area abruptly dilated around the central nodule. Striye 18 in 0,0 1 mm., closer at 

 the ends, in the middle frequently alternately longer and shorter. — Grun. A. D. p. 44. 



Fresh water: Mexico, fossil (Grun.). 



Var. Gregoryana Grun. (1880). — V. .slightly constricted in the middle. — N. Bacilliiw 

 Greg. M. J. IV, PI. I f. 4 (1856). .Y. hac rar. Grr<i. Grin. A. D. p. 44. 



Fresh water: Loch Leven, Scotland Greg. 



Var. ))ii)wr V. H. (1885). — V. half as large as the typical form. Strite 10 (middle) to 20 

 (end.s) in 0,oi mm. — V. H. Syn. p. 105 PI. XIII f. 10. 



Fresh water: Belgium (V. H.). 



Var. Icpifhi Greo. (1856). — V. elliptical with rounded ends. L. 0,o2 to 0,025; B. 0,oi mm. 

 Axial area indistinct, central small. Strite 17 (middle) to '2i] (ends) in 0,oi mm., slightly radiate 

 throughout. — N. lepida Greu. M. J. IV PI. I f. 25. V. H. Syn. PI. XIII f. 12. Icon. n. PI. V f. 14. 



Fresh water: Sweden (Hernosand foss.)! Finland (Abo)! Scotland (V. H. T.). Argentina 

 (Sierra Famatina)! 



5. N. trinotata Pant. (1893). — V. linear, with broad, rounded ends. L. 0,05 6 ; B. 0,oi4 

 mm. Axial area narrow, slightly dilated in the middle, where is an unilateral stigma. Near the 

 ends of the median lines is also an elongated stigma, placed on contrary sides of the median line. 

 Stripe 21, somewhat radiate in the middle, else parallel. — Pant. Ill PI. IX f. 152. 



Habitat? Kopecz (Pant.). 



6. N. Pseudo-bacilliini Grun. (1880). — V. linear-elliptical, with rounded ends. L. 0,035 

 to 0,045; B. 0,01 to 0.0 15 mm. Terminal nodules with two lateral expansions. Axial area narrow, 

 central area small, rounded. Stride in the middle 13 (Grun. 21 V. H.) in 0,oi mm. at the ends 20 

 (Grun. 24 V. H.) in 0,oi mm.; radiate throughout, very finely punctate. — N. Ifcrissima KtlTZ. 

 Bac. p. 96 PI. XXI f. 14 (1844)? V. H. Syn. PI. XIII f."l3? N. Jepiogongyla Ehb. p. p.? according 

 to Grun. N. Granum Schum. P. D. II N. p. 58 PI. II f. 46? according to Grun. JV. Icevissima 

 and N. Pscudo-hac. Grun. A. D. p. 45 PI. II f. 52 1880. .A^. Pseudo-har. V. H. Syn. p. 106 PI. 

 XIII f. 9. N. Bacilliim var. /? Strose Kliecken f. 9? 



Fresh water: Sweden (Boras)! Finland! Belgium (V. H.), Java, foss.! Japan! New Zealand! 

 Australian Alps! Canada, foss.! 



This species described and figured by Grunow in A. D. was at first believed by him to be 

 N. Jcemssima Kutz. But as this name may denote some form of K. Silicula Grunow proposed the 



K. Vet. .\ka(l. llandl. Baud 'iG. N:o 2. 1« 





