FIGURES 151–154 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah

FIGURES 151–154. SEM. Nitzschia vitrea. Internal valve views of three specimens. Fig. 151, Full valve showing variably spaced fibulae. Fig. 152, Tilted specimen showing striae that continue across roughly ⅔ of the valve mantle. Fig. 153, Apex with small helictoglossa and prominent fibula. Fig. 154, Central area showing elongate areolae and striae that are interrupted at the fibulae. Scale bars: Fig. 151: 20 µm; Fig. 152 µm: 10; Figs 153–154: 1 µm.