70 p. T. CLEVE, SYNOPiSlS OF THE NAVICULOID DIATOMS. ^ 



Var. Simbirskiana Pant. (1889). — V. lanceolate with protracted ends. L. 0,(i4 8; B. Ojil-s 

 mm. Area lanceolate. Striae 8 in 0,01 mm. — Nav. Simhirslciana Pant. 11 j). 53 PI. Xll f. 21(). 



Marine: Russia, Ananino, loss. (Pant.). 



Var. hevesensis Pant. (1889). — V. slightly constricted in the middle, with subcuneate ends. 

 L. 0,072; B. 0,01.") mm. Area wide, linear. Striae (i,.5 in (>,()i mm. — Nav. hevesensis Pant. 11 

 p. 47 PI. IV f. fi7. 



Brackish water: Hungary, foss. (Pant.). 



11. N. Kocliii Pant. (1889). — V. elliptical, with broad, rounded ends. L. (),oi: to 0,0 1 4 

 mm. Median line with approximate central pores, and small curved terminal tissures. Area narrow, 

 linear-lanceolate, widened in the middle. Stritv slightly radiate in the middle, 8 (8 to 12 Pant.) 

 in 0,01 mm., convergent at the ends. — Pant. 11 p. 49 PI. IV f. 72. 



Brackish water: Hungary, foss. (Pant.). 



12. N. Areschougiaiia Grun. (1860). -- V. narrow, linear, triundulate, with subrostrate, 

 obtuse ends. L. 0,i ; B. 0,008 mm. Area linear. StritC 10 in 0,01 mm. — Grun. Verb. 18(iO 

 p. 521 PI. Ill f. 23. 



Marine: Sweden, Bohuslan (Grun.). 



This species is entirely unknown to me, having never seen in the numerous gatherings from 

 west-coast of Sweden, which I have examined, anything similar to the fig. of Grunow. I have 

 provisionally placed this form near to Nac. palx)ehralis, among the varieties of which is a triundu- 

 late form, viz. vur. Botteriana. 



i:\. N. Vahliana Grun. (1874). — V. lanceolate, with suln-ostrate, obtuse ends. L. 0.04; 

 B. 0,011 mm. Area narrow lanceolate. Stria? 13 in 0,oi mm., divergent and alternately longer 

 and shorter in the middle, transverse at the ends. — A. S. N. S. D. PI. II f. 21. 



Marine: North Sea (A. S.). 



This speciee is unknown to me, perhaps a variety of X. 2>"lj)ebralis. 



14. N. palp('l)ralis Breb. (1853). — V. elliptic-lanceolate, with acute ends. L. i).o:\s to 

 0,08; B. 0,0 i;s to 0,0 16 mm. Area broad, lanceolate. Stria- 10 in 0,oi mm., radiate throughout, 

 not distinctly punctate. — Bri^b. in W. Sm. B. D. I p. 50 PI. XXXI f. 273. Grun. Verb. 18(i0 

 p. 536 PI. in f. 27. DoNK. B. D. p. 25 PI. IV f. 3. V. H. Syn. p. 96 PI. XI f. 9. 



Marine, usually litoral: Davis Strait! North Sea (coast of England, Norway and Bel- 

 gium)! Atlantic (Morocco)! Mediterranean (Balearic Islands! Adriatic Grun.). Galapagos Islands! 

 Connecticut ! 



Var. Barclayann Greg. (1857). — V. broad, linear with acuminate-apiculate ends. L. 0,o4i 

 to 0,043 (0,1 to 0,11 according to Greg.); B. 0,o2 (0,026 to 0,o3 according to Greg.) mm. Strict 

 11 to 12 in 0,01 mm. — Nar. Bard. Greg. D. of CI. p. 480 PL IX f. 9. Nav. palp. var. Barld. 

 V. H. Syn. p. 97 PI. XI f. 12. 



Marine: North Sea (Scotland, Greg., Belgium, V. H.), Mediterr. (Balearic Islands, Adriatic)! 



Var. angulosa Greg. (1856). — V. as the type. L. 0,oc, to 0,ii; B. 0,oi4 to 0,021 mm. 

 Area lanceolate, angular in the middle. — Nav. angulosa Greg. T. M. S. IV p. 42 PI. V f. 8. 

 DoNK. B. D. p. 26 PI. IV f. 4. A. S. N. S. D. II f. 19. Nav. palp. var. angulosa V. H. Syn. 

 PI. XI f 10. 



Marine: North Sea (Sweden! Belgium V. H.), Mediterranean (Naples)! 



Var. semiplenu Greg. (1859). — V. narrow, elliptic-lanceolate, with subacute ends. L. 0,o»i 

 to 0.07.5; B. 0,0 i;j to 0,01.5 mm. Area narrow, lanceolate. — Finn, scniqd. Greg. M. J. VII p. 84 

 PI. VI f. 12. Nav. angulosa var. /? Greg. T. M. S. IV p. 42 PI. V f. 8*. Nav. semipl. Donk. B. 

 D. ]). 26 PI. IV f. 5. Nav. prcesecia A. S. N. S. D. p. 90 PL II f. 20? 



Marine: Spitsbergen! FinmarkI Scotland (Grev.), Morocco! Fossil, Baldjik! 



