FIGURES 52–68 in New diatoms (Bacillariophyta) from western North America

FIGURES 52–68: Neidium inconstans, Neidium bobmarshallensis, Neidium fogedii, Neidium undulatum. Figs 52–55: Neidium inconstans from Indian Springs Pond, Waterton Lakes National Park, Alberta. Figs 56–59: Neidium bobmarshallensis. Fig. 56: Logging Lake, Glacier National Park, Montana. Figs 57, 59: Dean lake, Bob Marshall Wilderness, Montana (type locality). Fig. 57: Holotype specimen. Fig. 58: Upper Trilobite Lake, Bob Marshall Wilderness, Montana. Figs 60–65: Neidium fogedii from Mexican Cut Upper Pond No. 56, Gunnison County, Colorado. Figs 66–68: Neidium undulatum from Grassy (Axolotl) Lake, Madison County, Montana. Scale bars: 10 µm.