58 p. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. ■ 



Sea (Grruii.), Saxony! Great Salt Lake! Oregon, fossil! (ruatemala, fossil! Mexico, fossil! Argen- 

 tina, Rioja! Cameroon, Africa! 



Var. hnhniensis Cl. (1881). — L. 0,07 5 to 0,i2r); B. 0,o2 to (),o^ mm. Area wider. Stria; 

 11 to 12 in 0,0 1 mm. Longitudinal lines faint or indistinct. — Kar. holnt. Cl. X. R. I), p. 8 

 PI. II f 18. N. formosa V. H. Syn. PL XI f. 2. . 



Brackish water: Baltic, (Vaxholm, Abo)! 



Var. intcrrupfa Cl. — L. 0,o7; B. 0,oi3 mm. Axial area narrower. Central area a trans- 

 verse fascia. Strijy 16 in 0,oi mm., parallel. Longitudinal lines median. 



Brackish water: Yarra, S. Australia! 



Var. quadrilineata Grun. (1879). — L. 0,o44; B. (),o',) mm. Area narrow, lanceolate. Striie 

 about 17 in 0,oi mm. Longitudinal lines double. — N. quadrilineata Grun. Cl. M. IJ. N:o 204. 



Brackish water: Oakland, Calif. (Grun.). 



32. C. (Alloioueis) curviiiervia Grun. (1878). — V. lanceolate, slightly asymmetrical, with 

 obtuse ends. L. 0,o68 to (),ii.-); B. 0,022 to 0,028 mm. Median line excentric, with arcuate 

 components. Axial and central areas uniting in a narrow and asymmetrical lanceolate space. 

 Striiie 8 to !) in 0,oi mm. slightly radiate. Longitudinal lines distinct, median. — Grun. in Cl. 

 W. Ind. I), p. 8 PI. II f. 13. 



Brackish water: Elephant Point, India (Grun.) Island of Rhea near Singapore! 



33. €. ainphisbsv;na Bory (1824). — V. elliptical, with capitate to rostrate ends. L. 0,o6 

 to 0,08; B. 0,0 2 2 5 to 0,03 uim. Axial and central area uniting in a large rhombic-lanceolate 

 space. Stria? 16 to 17 in 0,oi mm. radiate to the ends. Longitudinal lines median. — Navic. am- 

 jjhish. Bory Encycl. meth. T. 2 (according to Ehrenb.). Frustidia depressa KtlTZ. Dec. X:o 72 

 (1833) according to Lagerst. — Nav. amphisbmia W. SiM. B. I). I PI. XVII f. 147 a. (1853). 

 Grun. Verb. 18(i() p. 534 PI. IV f. 36. Donk. B. D. p. 36 PI. V f. 13. V. H. Syn. p. 102 

 PI. XI f. 7. 



Fresh water: Sweden! England! Belgium (V. H.) Switzerland (Brun), Caspian Sea (Grun.). 



Var. fuscata Schum. (1867). — V. rectangular, with rostrate ends. L. (),04 to 0,o4.'); B. 0,oi 7 

 mm. Striie 16 in 0,oi mm. — Nav. fuscata Schum. Pr. D. II N. p. 57 PI. II f. 43. Grun. A. I), 

 p. 31 PL I f. 27. 



Brackish water: Baltic (Schum.), Kara Sea (Grun.). Caspian Sea (Grun.). 



Var. suhsalina Donk. (1873). - V. elliptical with rostrate-apiculate ends. L. 0,07; B. 0,025 

 mm. Striic 17 in 0,oi mm. — Nao. suhscdina Donk. B. D. p. 24 PL IV f. 2. Nav. amphishfena 

 W. Sm. B. D. I PL XVII f. 147 ri. Nav. aniph. v. subs. V. H. Syn. p. 102 PL XI f. 6. Dannf. 

 Bait. D. PL II f. 14. 



Brackisli water: Greenland! Spitzl)ergen ! Pinmark! Boliusliin ! north coasts of Britain (Donk), 

 Baltic'! Saxony, Mansfelderseen! Rostock, fossil! 



Forma, major. — V. lanceolate, with gradually attenuated ends. L. 0, 1; B. 0,o.! mm. — 

 V. H. Syn. PL XI f. 4. 



Brackish water: Belgium (V. H.). 



Var. Vukotinovicii Pant. (1886). — V. lanceolate, subrostrate. L. 0,077 to 0,095; B. 0,029 to 

 0,o;?2 mm. Area large, lanceolate. Striie 12,5 to 15 in 0,01 mm., closer near the ends. — Nav. 

 VnJw. Pant. I p. 29 PL I f. 7, II p. 54, PL XII p. 220. 



Brackish water: Hungary, fossil! 



Var. lihurnica Grun. (1860). — V. broadly lanceolate. L. 0,o5 to 0, 11; B. 0,022 to 0,o,s5 

 mm. Axial area narrow, slightly dilated in the middle. Sti'iae 16 to 17 in (),oi mm. Ijongitu- 

 dinal lines more approximate to tlie margin than td the median line. — Nav. lib. Grun. Verb. 

 1860 p. 517 PL 111 f. 25. 



Brackish: Adriatic (Grun.), Colon (Deby Coll.)! Calcutta (Deby Coll.)! 



