. Text book of zoology. Zoology. Class 1. Gymnomyxa. Order 1. Rhizopoda. 89 (Globigerina). Similar beds of Rhizopod shells have also been deposited in earlier times, and these, though in a more or less fragmentary condition, form a consider- able part of important geological strata (chalk). A m ce b 8B with lobate pseudopodia and without shells (c/., p. 3-5) occur both in salt and fi-esh water. Several genei^a. with simple uniloculaj- chitinous shells (sometimes covered with foreign bodies) ai-e found in fresh water (Fig. 47 A, B). One of the numerous marine sheU-beaiing f onns, which ai-e oft
. Text book of zoology. Zoology. Class 1. Gymnomyxa. Order 1. Rhizopoda. 89 (Globigerina). Similar beds of Rhizopod shells have also been deposited in earlier times, and these, though in a more or less fragmentary condition, form a consider- able part of important geological strata (chalk). A m ce b 8B with lobate pseudopodia and without shells (c/., p. 3-5) occur both in salt and fi-esh water. Several genei^a. with simple uniloculaj- chitinous shells (sometimes covered with foreign bodies) ai-e found in fresh water (Fig. 47 A, B). One of the numerous marine sheU-beaiing f onns, which ai-e often exti-emely fi-agile, is drawn iu Fig. i~ C. Among the veiy numerous fossil forms may be mentioned the genus NuniniulHes (Fig. 48), distinguished by its size, which is, for a Protozoon, ii^. 48. Suinrnttlitesd-uitans, natural size; the figure or the left represents an example which has been longitudinally dissected; that on the right, a transverse section. — After .Irchiac and Haime. Order 2. Eadiolaria. The Eadiolaria differ from the RhizojDoda, in possessing a central capsule, a porous membrane enclosing the greater portion of their protoplasm. Outside the central capsule there is a thin protoplasmic sheath, and outside this again, a thinner or thicker sheath of gelatinous material. The body is typically. 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 Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 1855-1935. Lehrbuch der Zoologie. London, Sampson Low, Marston
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
