The Philippine journal of science. [Vol. 57, no. 1]

472

472 ~The Philippine Journal of Science

1935

PINNULARIA GIBBA Ehr. forma SUBUNDULATA Mayer. Plate 2, fig. 12.
Pinnularia gibba Ehr. forma subundulata, F. HusmDT, Bacillar.
(1930) 327, fig. 601.
Valve linear with subundulate margins. Length, 0.070 mm;
breadth, 0.01; strive 8 to 9 in 0.01 mm.
PINNULARIA BRAUNII (Grun.) Cleve var. AMPHICEPHALA (A. Mayer) Hust. Plate
2, fig. 13.
Pinnularia braunii (Grun.) Cleve var. amphicephala F. HUSTEDT,
Bacillar. (1930) 319, fig. 578.
Valve linear with capitate ends. Median line a broad transverse fascia. Length, 0.035 mm; breadth, 0.0068; striae radiate,
12 in 0.01 mm. An alpine species.
PINNULARIA DACTYLUS Ehr.
Valve linear-elliptic. Length, 04.14,mm; breadth, 0.013; strkve
6 in 0.01 mm.
AMPHORA VENETA (Kutz.). Plate 2, fig. 15.
Amphora veneta F. HUSTEDT, Bacillar. (1930) 345, fig. 631.
Valve lanceolate with gibbous -dorsal margin. Length, 0.02
mm; breadth, 0.013; strive 18 to 20 (middle) or 24 (,ends) in 0.01
mm. A fresh- and brackish-water diatom.
AMPHORA. OVALIS Kutz. Plate 2, fig. 1:6.
Amphora ovalis F. HuSTEDT, Bacillar. (1930) 342, fig. 628.
Valve gibbous. Length, 0.024 mm; breadth, 0.014; strive without fascia, 15 in 0.01 mm. Common in fresh water.
AMPHORA OVALIS Kutz. var. LIBYCA (Ehr.) Cleve. Plate 2, fig. 17.
Amphora ovalis Kutz. var. libyca A. SCHMIDT, Atlas Diatom. (1875)
pl. 26, fig. 105.
Valve asymmetrical with gibbous dorsal margins. Strike radiate, 15 in 0.01 mm. In the middle opposite the stigma a broad
fascia. Length, 0.024 mm; breadth, 0.015. A fresh-water sp-ecies.
AMPHORA NORMANI Rabh. Plate 2, fig. 18.
Amphora normani F. HusTEDT, Bacillar. (1930) 343, 344, fig. 630.
Valve lanceolate with oblique ends. Length, 0.015 mm;
breadth, 0.0034. Common in mosses.
AMPHORA COFFEAEFORMIS Agardh var. Plate 2, figr. Itk.
Valve lunate with attenuate ends. Length, 0.018 mm; breadth,
0.0034; striae radiate, 15 in 0.01 mm. A brackish-water species.