KONGL. SV. VET. AKAJ)EMIENS HANDLINGAH. HANI) 26. N:() 2. 109 



Var. fhurholmensis Dannf. (1^82). — V. lanceolate, with more distinctly capitate ends. 

 L. 0,02; B. (),uor) mm. Stria; 26 in 0,oi mm. — Xav. thurhoitHensis D.\nnf. Bait. i). p. 27 L*l. 1 

 f. 11. .V. leevis Pant. LI p. 50 PI. XXV f. 366? 



Brackish water: Bay of Finland (Dannf. ). 



N. (jrcgaria connects N. crypioccphala of the section Lineolat;e with N. lialophila, so tliat it 

 might perhaps have been placed as well there as here. Its j)arallel stria' seem however to in- 

 dicate a closer relation to N. halojyhila. 



2. N. Wankareiriie Cl. (1883). — V. narrow, lanceolate, with obtuse, 2)rolonged ends. L. 

 0,035; B. 0,007 mm. Median line with approximate median pores. Axial area indistinct. Central 

 area a broad, transverse fascia. Striie parallel, about 30 in 0,oi mm., obsolete between the margin 

 and the median line. Longitudinal striae not seen. — N. KnjolconiUs? var. Wankarenue Cl. 

 Vega p. 473 PI. XXXVIl, f. 47. 



Marine: Cape Wankarema, North Siberian Sea! 



The accurate place in the system, which this form occupies, is difficult to decide. I have 

 placed it here, at it seems to be nearest akin to N. grcyaria. 



3. N. Kryokoiiites Cl. (1883). — V. lanceolate, obtuse. L. 0,o84; B. O,oii mm. Central 

 area a transverse, broad fascia. Striic 22 in 0,oi mm. — Cl. Vega p. 473 PI. XXXVIl f. 44. 



Marine: Cape Wankarema! 



Var. suhprotracta Cl. (1883). — V. rhombic-lanceolate, with subcapitate ends. L. 0,o33; 

 B. 0,00 7 mm. Strise 22 in 0,oi mm. — Cl. Vega 1. c. f. 46. 



Marine: Cape Wankarema! 



Var. semiperfecta Cl. (1883). — V. rhombic-lanceolate. L. 0,028; B. 0,oo8 mm. Central 

 area a unilateral fascia. — Cl. Vega 1. c. f. 45. 



Marine: (Jape Wankarema! 



4. N. microrhynchiis (tRUN. (1882). — V. narrow lanceolate, with acute, prolonged ends- 

 L. 0,024; B. 0,004 mm. Median pores approximate. Strife 16 (middle) to 17 (ends) finely punctate. 

 — Grun. Foss. D. Ost. Ung. p. 149 PI. XXX f. 46. 



Slightly brackish water: Hungary, fossil (Grun.). 



N. microrliynchus is according to Grunow related to N. Bulnheimii, which I have placed 

 among the Microstigmatica? because of its wider central strise and its, (somewhat indistinct) complex, 

 connecting zone. N. microrhyiirhHs Pant. (II p. 51 PI. Ill f. 38; PL VIII f. 145, 1889) is, if the 

 figures in Pantocsek's work be accurate, not the species of Grunow, which has no axial area. 



5. N. hiilophila Grun. (1881). — V. rhombic-lanceolate, subacute. L. Co.^?; B. 0,oi toO,oi2 

 mm. Stria; 19 to 20 (16 according to V. H. Syn.) in 0,oi mm. convergent at the ends, elsewhere 

 parallel. Longitudinal stria' fine. — ^Y. cuspidafa var. haloph. Grun. in V. H. Syn. p. 100 Suppl. 

 PI. B. f 30. .V. protrarta forma minor Pant. Ill PI. XX f. 301 (1893)? 



Brackish water: Sweden, Sturko in Blekinge! England, Hull! Belgium (V. H.) Saxony 

 (Mansfelderseen) ! France, Medoc! 



6. N. cuspidata Kutz. (1834). — V. rhombic-lanceolate, with acute ends. L. 0,o7 to 0,i.-, ; 

 B. 0,017 to 0,0.3 mm. Transverse striae 14 to 19, longitudinal 26 in 0,oi mm. — BacUlaria fulra 

 NrrszcH. p. p. 1817 (according to Kiitz.). N. fulva Donk. B. D. PI. VI f. 9? Frustiilia cuspidata 

 KiJTZ. Syn. PI. II f. 26. Xav. cuspidata KtJTZ. Bac. p. 94 PI. Ill f. 24, 37. W. Sm. B. D. I p. 47 

 PI. XVI f. 131. DoNK. B. D. p. 39 PI. VI f. 6. Grun. Banka D. PI. II f. 16. Fresenius Senckenb- 

 Abh. IV PI. IV f. 18. Strose Klicken f. 22. V. H. Syn. p. 100 PI. XII f. 4. Nac. Eeinickeana 

 Rabh. Alg. Sachs. N:o 802 (1859). VanhcurcJcia cuspidata Bri^b. Ann. Soc. phyto. et microgr. de 

 Belgique Vol. I p. 205 (1868). 



Fresh water: Sweden! Finland! Germany! France! Switzerland! Bengal! Japan! New Zea- 

 land! Australia (Murray Biver)! Guatemala, fossil! Ecuador! Dakota! Illinois! 



