120 p. T, CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. " 



Vai'. fossilis Pant. (1889). — V. L. 0,o65 to 0,o7i; B. 0,008 to 0,011.5 mm. Strise about 16 

 in 0,01 mm. — A. fossilis Pant. II p. 36 PI. I f. 2. A. curvata Pant. II p. 36 PI. I f. 11. 



Brackish water: Hungary, fossil (Pant.). 



This species, very frequent in brackish water, is of uncertain position in tlie system. It 

 differs from other forms of Hahcinpliora in its strongly biarcuate median line and broad, ventral 

 side. It has some resemblance to the species of the subgenus Amphora, but the zone is complex, 

 although the divisions are seen only with difficulty. The only species, with which it seems to be 

 connected, is A. Normani. I am uuable to discover any differences between A. fossilis and A. 

 curvata Pant, and both diff'er from A. commntata in somewhat closer striae only. 



8. A. bigibba Grun. (1875). — Frustule strongly constricted in the middle, truncate. 

 L. 0,02 to 0,04 6; B. 0,014 to 0,oi8 mm. Zone with numerous, more or less distinct divisions. V. 

 with straight ventral margin and protracted ends. Median line closely approximate to the ventral 

 margin. Dorsal striai delicate, 15 in 0,oi mm. — A. S. Atl. XXV f. 66, 67, 69, 70 to 77. 



Marine: Balearic Islands! Adriatic! Japan (Atl.), Chile (Atl.), Galapagos Islands! West 

 Indies ! Campeachy Ba}' ! 



Var. iuterrupta Grun. (1875). — L. 0,05 mm. Striai 13 in 0,oi mm. interrupted in the 

 middle of the valve. - A. S. Atl. XXV f. 65. 



Marine: Campeachy Bank. 



9. A. sarnieusis Grev. (1862). — Frustule with a strong constriction in the middle and a 

 shallow one between the middle and the ends, which are rostrate-truncate. L. 0,o4 to 0,o5; 

 B. 0,017 mm. Zone with about 4 divisions in 0,oi mm., transversely striate; striae 9 to 13 in 

 0,01 mm. V. with about 10 to 14 stria; in 0,oi mm. — T. M. S. 1862 p. 95 PI. IX f. 12. 



Marine: Guernsey (Grove Coll.)! Macassar Straits (Grove Coll.)! 



Var.? sinuata Grev. (1863). — L. 0,o7 mm. Margin with 7 constrictions. — A. sinitata 

 Grev. E. N. Ph. J. XVIII p. 183 f. 5. 



Marine: Queensland (Grev.). 



Var.? flexuosa Grev. (1863). — L. 0,o8 6 mm. Margin with 5 constrictions. — A. flex. Grev. 

 E. N. Ph. J. XVIII p. 183 f. 4. 



Marine: Queensland (Grev.). 



10. A. tetrag'ibba Cl. N. Sp. — Frustule subrectangular, with four undulations on the 

 margins. L. 0,035; B. 0,oi9 mm. V. with four equal undulations on the dorsal side. Ends 

 capitate and incurved. Median line close to the ventral margin. Striifi about 10 in 0,oi mm. — 

 A. sarniensis? A. S. Atl. XXV f. 80. A. sinuata aff". Grun. A. S. Atl. XXV f. 78, 79. 



Marine: Baltjik (Atl.), Japan (Atl.). 



11. A. cofftBiformis Kq. (1827). — Frustule lanceolate, 2 to 3 times longer than broad, 

 truncate. L. 0,o3 to 0,o5 mm. Zone with numerous, close divisions, 10 to 16 in 0,oi mm., very 

 delicately striate; striae about 21 in 0,oi mm. V. narrow with arcuate dorsal, somewhat concave 

 ventral margin, and protracted, capitate ends. Median line close to the ventral margin. Dorsal 

 striae about 20 in 0,oi mm. — Frustulia coffceiformis Ag. in Regensb. Flora 1827 II p. (! 2 7 (accor- 

 ding to Kiitz). KiJTZ Bac. p. 108. A. S. Atl. XXVI f. 56, 58. A. aponina KiJTZ Bac. p. 108 

 (1844). A. salina W. Sm. B. J), p. 19 PI. XXX f. 251 (1853). V. H. Syn. p. 57 PI. I f. 19. A. 

 lineata Greg. T. M. S. p. 71 PI. I f. 33 (1857). A. Neupaueri Pant. II p. 38 PI. I f . 7 (1889)? 

 A. Taylori Grun. V. H. T. N:o 13. 



Hot springs and brackish water: Sea of Kara! Baltic! Salines of Saxony! Iceland! Sand- 

 wich Islands! Austi-alia, Fischie River! West Indies! 



Var.? perpHsilla Grun. (1884). — L. 0,oo9 to O,oii mm. Striae more than 30 in 0,oi mm. 

 — Grun. Fr. Jos. Land D. p. 102. A. S. Atl. XXVI f. 98. 



Marine: Franz Josephs Land (Grun.), Nice (Atl.). 



