. Synopsis of the naviculoid diatoms. Presented to the R. Swedish Academy of Sciences May 10, 1893. Diatoms. KONGL, SV, VET. AKADEMIEN8 HANDLINGAE. JUAND 26. N:a 2. This species is remarkable for its arcuate valves, but in its essential characteristics seems to be nearest allied to N. plicata. 46. N. suavis Cl. and Grove N. Sp. â V. elliptic-lanceolate, flat. L. 0,115; B. 0,o4 mm. Axial area very narrow. Central area small, rounded. Median line ending close at the margin. Strise 18 in 0,oi mm. equidistant throughout, iinely punctate; puncta about 18 in 0,0 1 mm., somewhat coarser around t
. Synopsis of the naviculoid diatoms. Presented to the R. Swedish Academy of Sciences May 10, 1893. Diatoms. KONGL, SV, VET. AKADEMIEN8 HANDLINGAE. JUAND 26. N:a 2. This species is remarkable for its arcuate valves, but in its essential characteristics seems to be nearest allied to N. plicata. 46. N. suavis Cl. and Grove N. Sp. â V. elliptic-lanceolate, flat. L. 0,115; B. 0,o4 mm. Axial area very narrow. Central area small, rounded. Median line ending close at the margin. Strise 18 in 0,oi mm. equidistant throughout, iinely punctate; puncta about 18 in 0,0 1 mm., somewhat coarser around the central nodule, forming undulating longitudinal row^s. â PI. Ill f. 31, 32. Marine: Oamaru, New Zealand, fossil (Grove Coll.)! 47. N. plicatula Grun. Ms. â V. elliptic-lanceolate, with subacute ends, convex, with a more or less distinct longitudinal depression on each side of the median line. L. 0,0 7 5 to 0,115; B. 0,02 to 0,025 mm. Median line with approximate central pores and small terminal nodules at the ends of the valve, flexuose. Areas indistinct. Strise 15 to 19 in 0,oi mm. at the middle, slightly divergent, and 18 to 20 in 0,oi mm. at the ends, parallel, and finely, but distinctly punctate. â PL III f. 28. Marine: Gulf of Naples! Balearic Islands! Madagascar! Seychelles! Japan (Brun Coll.)! This is a very characteristic species, remarkable for its undulating median line. 48. N. inelegaiis Grove and Sturt (1887). â V. lanceolate, gradually tapering from the middle to the somewhat obtuse ends, where are short transverse diaphragms. L. 0,i8; B. 0,o3 mm. Median line with elongated central nodule and small terminal nodules at the ends of the valve. Terminal fissures indistinct. Areas indistinct. Stripe 13 in 0,oi mm. radiate at the ends, some- times crossed on each side of the central nodule by a short and narrow lateral area, punctate; puncta, about 15 in 0,oi mm., forming undulating longitudinal rows. â Grove and Sturt Q. M. Cl. J. Ill p. 132 PL X f. 6. Icon. n.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectdiatoms, bookyear1894
