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



Forma minuta. — L. 0,035; B. 0,014; at the constr. 0,ois mm. Costre 13 in 0,oi mm. 



Marine : Madagascar ! 



Var. distam Cl. — Horns of the central nodiile divergeut. 



Marine: Norway! (L. 0,052; B. 0,02; constr. 0,oi8 mm. Costee 9 in 0,ui mm.) Hungarj', 

 Szåkal! (L. 0,04; B. U.uie constr. 0,oi5 mm. Costse 10 in 0,ui mm.) Galapagos Islands! (L. 0,o;t2; 

 B. 0,013; constr. O,oii mm. CostcB 12 in 0,oi mm.). 



19. I), iuciirvata Greg. (185fi). — V. elongated, pandnriform. L. 0.06 to 0,o-; B. 0,013 to 

 0,01"; constr. 0,oi tu 0,oi2 ram. Central nodule small, (juadrate; its horns parallel. Fiirrows broad. 

 linear, not costate or pnnctate. Costte 11 to 12 in 0, 01 mm., parallel, slightly radiate at the ends. 



- Nav. inc. Greg. T. M. S. IV p. 44 Pl. V f. lo. Doxk. B. D. p. 49 Pl. VII f. 4. A. S. X. 

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



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



20. 1). interruptii KitTZ (1844). — V. deeply constricted, its segments broadl}' elliptical to 

 orbicular, with ronnded ends. L. 0,o2!) to 0,072; B. 0,012 to 0,024; at the constr. 0,oo7 to 0,oi3 mm. 

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

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



— JSfav. interr. Kutz Bac. p. 100 Pl. XXIX f. 93. Donk. B. D. p. 47 Pl. VII f. 2. Grun. Verh. 

 1860 p. 531 Pl. V f. 20. Lägst. Spitsb. D. p. 28 Pl. II f. 6. A. S. N. S. D. Pl. 1 f. 8. Atl. XH 

 f. 3, 4, 5, 11; LXIX f. 24. V. H. Syn. p. 89 Pl. IX f. 7, 8. Diphneis diäijina Ehb. Abh. Berl. 

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

 v. Novce Zealandice A. S. Atl. XII f. 12. 



■ Brackish water: Spitzbergen! Beeren Eilaiid (Lägst.), Kära! Finmark! North Sea! Baltic 

 (Torneå to Rtigen)! Mediterranean Sea! Red Sea (Grun.), Java! Samoa! Australia! Auckland (Grun.), 

 Cape Good Hope (Atl.), Atlantic coast of America! Greenland! Arctic America! Franzeubad! HaUe! 

 Great Salt Lake! 



Var. TaUyaua Grun. (1882). — Costte interrupted in the middle, outside the furrow. — 

 Nav. interr. v. Tall. Grun. F. D. Öst. Ung. p. 150 Pl. XXX f. 59. 



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



Var. sanzibarica Grun. (1875). — V. deeply constricted. L. 0,o5 to 0,07; B. 0,02 to 0,033; 

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

 gent. CostcE 7 to 8 in 0, 01 mm. (according to A. S. Atl. alternating with roAvs of puncta). — 

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



Brackish and marine: Zanzibar (Atl.), Carpentaria, Austx-alia (Atl.). 



Var.? Weisneri Pant. (1886). — V. less constricted. L. 0,021 to 0,032; B. 0,oi to 0,014; at 

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

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

 p. 48 Pl. VI f. 112; Pl. 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, 007 to 0,009 mm. Horns slightly divergent. Costa^ 

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

 f. 81. Nav. Ileerii Pant. II p. 47 Pl. XI f. 195; Pl. XII f. 210 (1889). ?iYat'. Gorjanov. rar. major 

 Pant. II p. 46 Pl. V f. 78.? Nav. smpccta? var. C>:e1iehazensis Pant. II j). 44 Pl. IV f. 56. 

 Brackish water: Hiingary, fossil (Pant.)! 



Var. clancula A. S. (1875). — V. deeply constricted, with almost orbicular segments. L. 0,o36; 

 B. 0,0 18, at the constr. 0, 009. Costte 8 to 9 in 0, 01 mm. not interrupted in the middle. — Nar. 

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



Marine: Australia (Atl.). 



