52 p. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. - 



Var. curta Grun. (1880). — V. linear-elliptical, with cuneate ends. L. (),o;i; B. 0,012 mm. 

 Nav. Urn. v. curta GtRUN. in V. H. Syn. PJ. XII f. 23. 



Var. capitata Lagst. (1873). — V. strongly inflated in the middle and with broad, sub- 

 truncate ends. L. 0,o6; B. 0,0075 mm. — Lagst. p. 31. PI. I fig. 7 a. 



Fresh water: Spitsbergen (Lagst.). 



In Verh. 1860 Grunow describes Iavo more varieties, named truncata and hicuiteuta, which 

 however seem to be forms of Neidium. 



B. Forms tvifh transverse fascia. 



Var. minuta Grun. (1880). — V. strongly gibboiis in the middle, with clavate or cuneate 

 ends. L. 0,022 to 0,033; B. 0,oo6 mm. Axial area indistinct. StrifB 21 to 22 in 0,oi mm. — 

 Nav. ventricosa var. minuta? Grun. in V. H. Syn. PI. XII f. 26. 



Fresh water: Spitsbergen! Finland, Kuopio! Belgium (V. H.). 



Var. ventricosa [Ehb. 1830?] Donk. (1873). — Linear gibbous in the middle and at the 

 rounded ends. L. 0,04 to 0,o6; B. 0,oo9 to 0,on mm. Axial area narrow. Striiie 18 to 20 in 0,i)i 

 mm. parallel or slightly radiate. — Nav. ventricosa Ehb. Abh. 1830 p. 67? Donk. B. I), p. 74 

 PI. XII f. 7. V. H. Syn. p. 103 PI. XII f. 24. Nav. Horvathii Grun. Verh. 1860 PL VI f. 18. 

 Var. Haslinszlq/i Pant. II p. 47 PI. XI f. 193 (1889). — Nav. ventricosa var. stihunduUita 

 Grun. A. D. p. 29 PI. I f Ki. Nav. neogena Pant. Ill PI. XVII f. 252; PI. XXV f. 372 (1893)? 



Fresh or brackish water: Sweden! Finland! Sea of Kara (Grun.), England (Donk.) Japan! 



Var. trmicatula Grun. (1880). — V. elliptical, with rounded ends, not gibbous. L. 0,04; 

 B. 0,01 mm. Axial area narrow. — Nav. ventric. v. truncat. Grun. V. H. Syn. PI. XII f. 25. 



Var. Kjellmaniana Grun. (1880). — V. gibbous in the middle with more narrow and rounded 

 ends. L. 0,of.;?; B. 0,oii5 mm. Axial area narrow. Stri;ie 16 to 17 in 0,oi mm., slightly radiate. 

 — Nav. vent. v. Kjellm. Grun. A. D. p. 29 PI. If. 17. 



Marine: Finmark! 



V. Jenisseijrnsis Grun. (1880). — V. slightly gibbous in the middle. Eiuls rounded. L. 0,044.'^); 

 B. 0,01 mm. Striie 19 in 0,oi mm., parallel, slightly divergent at the eiuls. — Nav. ventric. v. 

 Jeniss. Grun. A. D. p. 29 PI. I f. 18. 



Fresh water: Jenissey (Grun.). 



Var.? suhventricosa Grun. (1880). — V. gibbous in the middle, with broad, rounded ends. 

 L. 0,066; B. 0,009.5 mm. Central nodule slightly dilated transversely. Axial area very narrow. 

 Striae. 22 to 23 in 0,oi ram., convergent at the ends. — Nav. suhventricosa Grun. A. D. p. 29 

 PI. I f. 19. 



Brackish water: Sea of Kara (Grun.). 



9. C. tahitensis Grun. (1863). — V. lanceolate, inflated in the middle, with obtuse ends. 

 L. 0,0.54 to 0,06.5; B. 0,002 mm. Axial and central areas indistiuct. Stria^ 12 to 13 in 0,oi mm., 

 slightly radiate, finely punctate. Longitudinal lines median. — Nav. Tah. Grun. Verh. 1863 p. 152 

 PI. V. f. 15. Nov. p. 19. 



Fresh water: Tahiti (Grun.). 



This species is unknown to me, perhaps it is onl}' a variety of N. Silicula. 



10. C patagonica Cl. (1881). — V. convex, linear with cuneate ends. L. 0,0.57 to O.09; 

 B. 0,009 to 0,013 mm. Axial area narrow, but distinct. Central area a broad fascia, reaching to 

 the margins. StrifB 13 to 14 in 0,01 mm., almost parallel, but radiate at the ends, crossed near 

 the margin by a faint longitudinal line. — Nav. viridis var. putay. Cl. Fiirskv. I). Iran Gronl. och 

 Arg. p. 12 PI. XVI f. 3. 



Fresh water, on moist rocks: Sierra Famatina, Rep. Arg.! Pichincha, Ecuador! 

 This remarkable freshwater-species may easily be mistaken for a Pinnularia, but the termi- 

 nal striae are radiate, not convergent as in the last named genus. 



