KONGL. SV. VKT. AKA I)P:MIEN.S II ANDIJ N( I A 1!. HAND 27. N:(i 3. Hfl 



min. divergent in the middle, convergent at the ends; a few sliortei' sti'i;e are occasionally inter- 

 calated among th(> median. - Pant. I p. 25 PI. Xi f. ill. 11 PI. 1 f. 12. 



Marine, brackish: Hungary fossil! Atlantic ('ity, X. .lers. U. S. Aincr. foss. (heliy ('oll.)I 



Var. rohiistd Pant. (1SS9). — L. 0,ii;; B. (),(i,u; mm. StrirC U) to 12, r, in (>,(.i mm. — 

 Nar. robusta Pant. 11 p. 5:5 PI. IX f. IT)!). 



Bracki.sh water: Hungary, foss. (Pant.). 



Var. direcfa Pant. (1889). — V. linear, with cuneate ends. L. O.ii; 15. (I.1121 mm. Strife 

 10 in 0,01 mm. — Pant. II p. 46 PL XII f. 211. 



Brackish water: Hungary, fossil (Pant.). 



Var. iiiinur Pant. (1889). — V. elliptic-lanceolate. L. <),(i;i; P>. (I.d^r, mm. Stri;e 10 in 0,<m 

 ram. — Pant. II p. 1(5 PI. XXVI f. 381. 



Marine: Hungary, fossil (Pant.). 



Nav. halionata is a beautiful species, akin to N. Yarrcnsis and N. palpebraiis, but mu( h 

 larger. Between X lialionafa and N. rohusfa I am unable to tind any ditFerencc of imjiortance. 



!•. N. Rat'aiia Castk. (ISS(i). — V. lanceolate sigmoid, twisted. L. U,oy to (),i.^; B. O.o.-j.^i 

 to 0,0 1 mm. Area narrow, somewhat dilated in the middle. Stria; smooth, 4, .5 to 5 in U,oi mm. 

 — Finn. Eaeana Castr. D. Challenger p. 25 PI. XV f. 3. Nav. contorta Kitton Ms. 



Brackish water: Ceylon! Singapore! Java! Siimatra! Labnan! Hongkong! 



This remarkable forni is nearly akin to N. Yarrcnsis, of which it is perhajjs a contorted 

 ^ariety. 



1(^ N. Yarrensis Grun. (lH7(i). - V. lanceolate, to narrow elliptical, with obtuse ends. 

 L. 0,06 to 0,20; B. 0,02 to 0,(i;i8 mm. Median line with small terminal fissures. Area linear to 

 lanceolate, more or less broad. Strife 4 to 4,.'j in 0,01 mm., divergent in the middle slightly con- 

 vergent towards the ends, where they are a little closer. — A. S. Atl. XLVl f. 1 to 6. Pant. I 

 PI. II f. 20; II PL X f. 178, XII f. 219, XVI f. 274. 



Brackish water: Kiel (Atl.), Hungary, fossil! S. Africa! Madagascar! Singapore! Ceylon! 

 .lava! Japan! Australia! Florida! Atlantic City N. Jers. U. S. Amer. fossil (]j. 0,i6; B. 0,(i3. 

 Strife (i in 0,ei mm.). Cameroon! 



Var. (Oiwricana Cl. — L. 0,()'.i; B. 0,(ii8. Strife 7 to <s in (),oi mm. Area narrow. 



Brackish water: Atlantic coast of U. S. Quincy Mass.! Cape May! Connecticut! 



Var. bituminosa Pant. (1889). — V. elliptic-lanceolate. L. 0,o56 to 0,075; B. 0,i)ib to0,ui8.=) 

 mm. Area lanceolate, wide. Strife 5 to 8 in 0,01 mm. — Pant. II p. 55 PL IV f. 74. 



Brackish water: (lyongyos Pata etc., Hungary (Pant.). 



Var. (jracilior Pant. (1889). — V. lanceolate. L. 0,062; B. O,oir, mm. Area wide. Strife 

 (i in 0.01 mm. — Pant. IV p. 55 PL XXI f. 323. 



Marine: Bory Dept. Hungary (Pant.). 



Var. valida Pant. (1889). — V. broad, lanceolate. L. 0,057; B. 0,02 mm. Area wide, lanceo- 

 late. StricT 7 to 8,5 in 0,oi mm. — Pant. II p. 55 PL XII f. 212. 



Brackish water: Szurdok-Piispoki Dept. Hungary (Pant.). 



Var. Dk Wiftiana Kain & Schultz. — V. broadly linear with ])rotracted ends. L. 0,ii; 

 B. 0,().i mm. Area narrow, lanceolate. Striee 5 in 0,oi mm. — Xav. De Wittiana KMfi & Schultz 

 Tor. Bot. Club Aug. 1889 Vol. XVI N:o 8 p. 209 PL XCIII f. 5. 



Marine: Atlantic City, N. Jers. foss. (Deby Coll.)! 



Var.? aradina Pant. (1893). — V. lanceolate. L. 0,or; B. 0,02 mm. Area broad, lanceolate. 

 Strife 5 to (i in 0,oi mm. - Xav. aradina Pant. Ill PL XXX f. 434. 



Marine?: Kavna-Bremia, Hungary, fossil (Pant.). 



Var.? Phalanf/iuiii Pant. (1893). -~ Linear, with cuneate ends. L. O.oe; B. O.017 mm. 

 Area narrow-lanceolate. Striae 6 in 0,o) mm. — Xav. phalamiium Pant. Ill PL XXX f. 432. 



Marine?: Kavna-Bremia, Hungary, fossil (Pant.). 



