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



Ann. Mag. N. H. [2] X p. 10 PI. 11 f. 9 (1852). B. D. 1. c. f. 215. V. H. Syn. p. 117 PI. XX 

 f. 3. Per. VII f. 4 to 7. P. att. var. easpia Gkun. Casp. Sea Alg. p. 18 PI. Ill f. 8. Per VII 1". 8. 



Fresh and brackish water: Sweden! Finland! England! Saxony! Belgium (V. H.), France! 

 Baltic! North Sea! Caspian Sea (Grun.). 



Var. Scalprum Gaill. a. Turp. (1827). — L. 0,i2 to 0,i5; B. 0,oi9 mm. T.S. : L.S. '7,6, 

 "/i,. — Nav. Scalprum Gaill. a. Turp. Mem. du Museum XV PL X, XI f. 3 (accord, to Klitz.). 

 P. acuminatum W. Sm. B. D. I p. 66 PI. XXI f. 209. Grun. A. D. p. 55. Per. p. 17 PI. VII f. 3- 

 PI. Kochii Pant. Ill P]. IX f. 153 (1893)?? 



Brackish and marine: North Sea! 



10. Gr. litorale W. Sm. (1852). — V. sigmoid, lanceolate, with attenuate, slightly rostrate 

 ends. L. 0,ii to 0, 19; B. 0,022 to 0,045 mm. Median line sigmoid, central. Longit. strise very 

 strong and distant. T.S. : L.S. I'/io ^^ 0,oi mm. — P. litorale "W. Sm. Ann. and Mag. N. Hist. 

 [2] IX p. 10 PL II f. 8. B. D. 1 p. 67 PL XXII f. 214. Per. VII f. 1. 



Marine: North Sea! English Channel (W. Sm.), Mediterranean Sea (Per.). 



11. G. distortum W. Sm. (1852). — V. lanceolate, slightly sigmoid. Ends more or less 

 abruptly produced into short, obtuse beaks, turned in contrary directions. L. 0,07 to 0,12; B. 0,oi7 

 mm. Median line sigmoid, central. Transv. striae more distant than the longit. T.S. : L.S. '^^j^j, 

 23/28. — -^^ew. dist. W. Sm. Ann. Mag. Nat. Hist. [2] IX p. 7 PL I f. 10; B. D. I p. 67 PL XX 

 f. 210. Per. VIII f. 32. 



Marine: Spitzbergen! North Sea! English Channel (W. Sm.), Ionian Archipelago (Grun.), 

 Cameroon, Africa! 



Var. Parheri Harrison (1860). — L. 0,o8 to 0,15; B. O,oi.'i to 0,02.5 mm. T.S. : L.S. "/22 

 (Grun.), ^-o/2^, 21/^^^ 23/^^ in 0,oi mm. — Pleur. Park Harri. M. J. 1860 p. 104. Grun. A. D. p. 57. 

 V. H. Syn. p. 118 PL XXI f. 10. Per. VIII f. 33. 



Fresh and brackish water: Baltic! England! Belgium! 



Var. stauroneoides Grun. (1880). — Central nodule transversely dilated. T.S. : L.S. 2*/,^, 

 0,01 mm. — Pleur. ParJc. var. stauron. Grun. A. D. p. 57. 



Brackish water: Hudson River (Grun.). 



12. G. Fasciola Ehb. (1839). — V. lanceolate, attenuated into long, linear beaks, curved 

 in opposite directions. L. 0,09 to 0,15; B. 0,oi5 to 0,024 mm. Median line central, straight in the 

 middle of the valve. T.S. : L.S. ^y^^^ 23/^^ in O.oi mm. — Ceratoneis Fasciola Ehb. Abh. 1839 

 (accord, to Chase). Pleur. Fasciola W. Sm. B. D. I p. 67 PL XXI f. 211. Grun. A. D. p. 58. 

 V. H. Syn. p. 119 PL XXI f. 8. Hendry T. M. Soc. 1862 X p. 152. Per. VIII f. 36 to 38. 



Marine: Spitsbergen! North Sea! California! Barbados! 



Var. sulcata Grun. (1880). — Longitudinal striae strong. T.S. : L.S. "/u (Grun.), ^"/j,, 23^'^^ 

 in 0,01 mm. — P. {Fasc. car.'/) sulcatum Grun. A. D. p. 55 PL IV f. 75. V. H. Syn. XXI f. 7. 

 Per. VIII f. 43. 



Marine: Sea of Kara (Grun.), Spitsbergen! Firth of Tay (Grove), Mouth of Seine! 



Var. temiirostris Grun. (1880). — L. 0,i4 to l.ie; B. 0,oii to 0,012 mm. T.S. : L.S. '"/^g, 

 ^Vjo in 0-0 1 «i™- — P- {Fasc. var.?) tenuirostris Grun. A. D. p. 55 PL IV f. 76. Per. VIII f. 42. 



Marine: Sea of Kara (Grun.). 



Var. arcuata Donk. (1858). — V. lanceolate. Ends more suddenly produced into long, narrow 

 beaks curved in contrary directions. L. 0,i to 0,115; B. 0,oi2 mm. Median line central, straight. 

 Transv. strise 24 to 25 (Grun.) in 0,oi mm.; longitudinal liner. — Pleur. arcuat. Donk. T. M. S. 

 VI p. 25 PL III f. 10. Per. VIII f. 34, 35. 



Marine: Coast of Sweden (Grun.)! England (Donk.). 



Gyros. Fasciola is intimately connected with G. distortum var. ParJceri, and by the Var. 

 tenuirostris, with G. macrum. 



