70 p. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. 



Var. Simbirskiana Pant. (1889). — V. lanceolate with protracted ends. L. U,04 8; B. O,oift 

 mm. Area lanceolate. Strise 8 in 0,oi mm. — Nav. Simbirskiana Pant. II p. 53 PI. XII f. 216. 



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



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

 L. 0,072; B. 0,015 mm. Area wide, linear. Strise 6,.'> in 0,oi mm. — Nav. hevesensis Pant. II 

 p. 47 PL IV f. 67. 



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



11. N. Kochii Pant. (1889). — V. elliptical, with broad, rounded ends. L. 0,oi7 to 0,oi4 

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

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

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



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



12. N. Areschougiana Grun. (1860). — V. narrow, linear, triundulate, with subrostrate, 

 obtuse ends. L. 0,i; B. 0,oo8 mm. Area linear. Strise 10 in 0,oi mm. — Grun. Verb. 1860 

 p. 521 PL III f. 23. 



Marine: Sweden, BohusMn (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 Nav. palpebralis, among the varieties of which is a triundu- 

 late form, viz. var. Botteriana. 



13. N. Tahliana Grun. (1874). — V. lanceolate, with subrostrate, obtuse ends. L. 0,o4; 

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

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



Marine: North Sea (A. S.). 



This speciee is unknown to me, perhaps a variety of N. pal^jebralis. 



14. N. palpebralis Br^b. (1853). — V. elliptic-lanceolate, with acute ends. L. 0,o3 8 to 

 0,08; B. 0,013 to 0,016 mm. Area broad, lanceolate. Strise 10 in 0,oi mm., radiate throughout, 

 not distinctly punctate. — Br^b. in W. Sm. B. D. I p. 50 PL XXXI f. 273. Grun. Verb. 1860 

 p. 536 PL III f. 27. DoNK. B. D. p. 25 PL IV f. 3. V. H. Syn. p. 96 PL XI £ 9. 



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

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

 Connecticut ! 



Var. Barclayana Greg. (1857). — V. broad, linear with acuminate-apiculate ends. L. 0,04i 

 to 0,043 (0,1 to 0,11 according to Greg.); B. 0,02 (0,026 to 0,03 according to Greg.) mm. Strise 

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

 V. H. Syn. p. 97 PL 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,o6 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 PL V f. 8. 

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

 PL XI f 10. 



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



Var. .lemiplena Greg. (1859). — V. narrow, elliptic-lanceolate, with subacute ends. L. 0,0 6 

 to 0,075; B. 0,013 to 0,0 15 mm. Area narrow, lanceolate. — Finn, semipl. Greg. M. J. VII p. 84 

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

 D. p. 26 PL IV f 5. Nav. prcesecta A. S. N. S. D. p. 90 PL II f. 20? 



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



