. The biology of the Protozoa. Protozoa; Protozoa. 360 BIOLOGY OF THE PROTOZOA 2. Aperture of test circular 3 Aperture of test ellipsoidal or linear Genus Plagiopyxis 3. Aperture without lobed external 4 Aperture with three or four lobed external collar Genus Cucurhitella 4. Aperture excentric in position Genus Centropyxis Aperture central; sjTiimetrical 5 5. Test covered with diatom shells; pseudo- podia pointed Genus Phryganella Test covered with sand, mud, detritus, etc. (Fig. 155) '. Genus Difflugia •. Fig. 155.—Difflugia lohostoma plastoganiic stages formerly interpreted as evi
. The biology of the Protozoa. Protozoa; Protozoa. 360 BIOLOGY OF THE PROTOZOA 2. Aperture of test circular 3 Aperture of test ellipsoidal or linear Genus Plagiopyxis 3. Aperture without lobed external 4 Aperture with three or four lobed external collar Genus Cucurhitella 4. Aperture excentric in position Genus Centropyxis Aperture central; sjTiimetrical 5 5. Test covered with diatom shells; pseudo- podia pointed Genus Phryganella Test covered with sand, mud, detritus, etc. (Fig. 155) '. Genus Difflugia •. Fig. 155.—Difflugia lohostoma plastoganiic stages formerly interpreted as evidence of conjugation. (From Calkins after Rhumbler.) 6. Test with constricted neck and internal shelf. Genus Pontigulnsia Test without internal shelf 7 7. Test with foreign particles on dome 8 Test covered; aperture a long and narrow slit Genus Bullinula 8. Aperture of test convex Genus Heleopera Aperture small, ellipsoidal, with thickened margins Genus Awerintzia Family 3. Euglyphidae. 1. Cells without chromatophores 2 Cells with one or two blue-green chroma- tophores Genus Paulinella 2. Test curved, retort-shape 3 Test dome-shape; not curved 5. 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 Calkins, Gary N. (Gary Nathan), b. 1869. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookauthorcalkinsgaryngarynatha, bookcentury1900, bookdecade1920
