84 r. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. 



Forma minuia. — L. 0,035; B. 0,014; at tlie constr. 0,oi;! mm. Costa? 13 in 0,oi mm. 



Marine: Madagascar! 



Var. distans Cl. — Horns of the central nodule divergent. 



Marine: Norway! (L. 0,052; B. 0,oi;; constr. 0,oi8 mm. Costse in 0,oi mm.) Hungary, 

 Szakal! (L. 0,04; B. 0,oi6 constr. 0,oi.'j mm. Costa? 10 in 0,01 mm.) Galapagos Islands! (L. 0,032; 

 B. 0,013; constr. 0,011 mm. Costse 12 in 0,oi mm.). 



19. I), iiicvirvata Greg. (185r)). — V. elongated, panduriform. L. 0,()t) to 0,07; B. 0,oi.'5 to 

 0,017; constr. 0,01 to 0,012 mm. Centi'al nodule small, ([uadrate; its horns parallel. Furrows broad, 

 linear, not costate or punctate. Costiv 11 to 12 in 0,oi mm., parallel, slightly radiate at the ends. 



— Nav. inc. Greg. T. M. S. IV p. 44 PI. V f. 13. Donk. B. D. p. 41) Pi". VII f. 4. A. S. X. 

 S. D. PL I f. 10, 11; II f. 6. 



Marine: Finmark! North Sea! Morocco! Florida! Galapagos Islands! (Jape of Good Hope! 



20. D. inteiTupta KiiTZ (1844). — V. deeply constricted, its segments broadly elliptical to 

 orbicixlar, with rounded ends. L. 0,o2ii to 0,072; B. 0,012 to 0,024; at the constr. 0, 007 toO,oi;> mm. 

 Central nodule elongated, quadrate, its horns parallel. Furrows linear, narrow. Costa' 8 to 12 in 

 0,01 mm., divergent, usually interrupted or not reaching the margin in the middle of the valve. 



— Nav. interr. KtJTZ Bac. p. 100 PI. XXIX f. 93. Donk. B. D. p. 47 PI. VII f. 2. Grun. Verh. 

 1860 p. 531 PI. V f. 20. Lagst. Spitsb. D. p. 28 PI. II f. 6. A. S. N. S. D. PI. I f. 8. Atl. XII 

 f. 3, 4, 5, 11; LXIX f. 24. V. H. Syn. p. 89 PI. IX f. 7, 8. Biphnds didyma Ehb. Abh. Berl. 

 1870 PI. II f. 13. W. Sm. B. I). XVII f. 154 a'. Nav. Fuella A. S. Atl. LXIX f. 25. Nav. interr. 

 V. Novre Zealandice A. S. Atl. XII f. 12. 



Brackish water: Spitzbergen! Beeren Eiland (Lagst.), Kara! Finmark! North Sea! Baltic 

 (Tornea to Riigen)! Mediterranean Sea! Red Sea (Grun.), Java! Samoa! Australia! Auckland (Grun.), 

 Cape Good Hope (Atl.), Atlantic coast of America! Greenland! Arctic America! Franzenbad! Halle! 

 Great Salt Lake! 



Var. Talhjana Grun. (1882). — Costa^ interrupted in the middle, outside the furrow. — ■ 

 Nav. interr. r. Tall. Grun. F. D. Ost. Ung. p. 150 PI. XXX f. 59. 



Brackish water: Tallya, Hungary, fossil (Grun.). 



Var. zanziharica Grun. (1875). — V. deeply constricted. L. 0,o.^> to 0,07; B. 0,02 to 0,o;!;i; 

 at the constr. 0,009 to O.017 mm. Segments nearlj- orbicular. Horns of the central nodule diver- 

 gent. CosttB 7 to 8 in 0,oi mm. (according to A. S. Atl. alternating with rows of puncta). — 

 Nav. interr. v. zans. A. S. Atl. XII f. 1, 2. 



Brackish and marine: Zanzibar (Atl.), Carpentaria, Australia (Atl.). 



Var.? Weii>)icri Pant. (1886). — V. less constricted. L. 0,o2i to 0,032; B. 0,oi to 0,014; at 

 the con.str. 0,oi2 mm. Segments tongue-shaped. Horns somewhat divergent. Cost<3e 10 to 12,5 in 

 0,01 mm. — Nav. Weisncri Pant. I p. 29 PI. XVIII f. 158. Nav. interr. var. fossilis Pant. II 

 p. 48 PI. VI f. 112; PI. XII f. 208, 215 (1889). 



Brackish water: Hungary fossil! 



Var.? Gorjanovicii Pant. (1886). — V. gently constricted, with elliptical segments. L. 0,022 

 to 0,036; B. 0,012 to 0,014; at the constr. 0,oo7 to 0,009 mm. Horns slightly divergent. Costa; 

 8 to 12,5 in 0,01 mm. not interrupted in the middle. — Nav. Gorjanovicii Pant. I p. 25 PI. IX 

 f. 81. Nav. Heerii Pant. II p. 47 PI. XI f. 195; PI. XII f. 210 (1889). ?Nav. Gorjanov. var. major 

 Pant. II p. 46 PL V f. 78.? Nav. smpcefa? var. Czelceliazensis Pant. II p. 44 PL IV f. 56. 

 Brackish water: Hiingary, fossil (Pant.)! 



Var. clancula A. S. (1875). — V. deeply constricted, with almost orbicular segments. L. 0,o3ti; 

 B. 0,0 18, at the constr. 0,oo9. Costa. 8 to 9 in 0,o 1 mm. not interrupted in tlie middle. — Nav. 

 clanc. A. S. Atl. XII f. 33, 34. 



Marine: Australia '(Atl.). 



