. The Canadian field-naturalist. Natural history; Sciences naturelles. Figure 4. Arcella formosa tests, a. Drawing of the ventral surface (translucency of the test allows the ridges separating the depressions on the dorsal surface to be revealed; see also Figure 4j; scale bar applies to all Figures 4a-l). b. Drawing of the lateral view; the pseudostomal aperture (ap) is on the ventral surface; D = test diameter; H = test height, c. Image of the ventral view of a test. d. Image of the lateral view of the same specimen illustrated in Figure 4c. e. Image of the ventral view of a different specime
. The Canadian field-naturalist. Natural history; Sciences naturelles. Figure 4. Arcella formosa tests, a. Drawing of the ventral surface (translucency of the test allows the ridges separating the depressions on the dorsal surface to be revealed; see also Figure 4j; scale bar applies to all Figures 4a-l). b. Drawing of the lateral view; the pseudostomal aperture (ap) is on the ventral surface; D = test diameter; H = test height, c. Image of the ventral view of a test. d. Image of the lateral view of the same specimen illustrated in Figure 4c. e. Image of the ventral view of a different specimen, f. Image of the lateral view of the same specimen illustrated in Figure 4e; arrows indicate the location of the buccal tube. g-i. Images of the lateral view of a different specimen at three differ- ent levels of microscopic focus, j-1. Images of the ventral side (j), sub-dorsal (k), and dorsal (1) surfaces of the same specimen illustrated in Figures 4 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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