. Elementary text-book of zoology. Zoology. 188 PROTOZOA. differentiations of the sarcode, particularly of the central capsule. One or more nuclei may be present in the central mass. An im- portant distinguishing mark is afforded by the presence of the pulsating vacuoles, which have not been observed in any marine Hadiolarian. The reproduction very frequently takes place by fission, occasionally. FIG. 129.—Thalassicolla pelagica, with central capsule and single largenucleus, also numerous alveoli in the protoplasm (after E. Haeckel). after previous conjugation of one or more individuals, also
. Elementary text-book of zoology. Zoology. 188 PROTOZOA. differentiations of the sarcode, particularly of the central capsule. One or more nuclei may be present in the central mass. An im- portant distinguishing mark is afforded by the presence of the pulsating vacuoles, which have not been observed in any marine Hadiolarian. The reproduction very frequently takes place by fission, occasionally. FIG. 129.—Thalassicolla pelagica, with central capsule and single largenucleus, also numerous alveoli in the protoplasm (after E. Haeckel). after previous conjugation of one or more individuals, also during encystment. Multiplication by spores has also been observed (Clathrulina). in the Actinopliryidfs there is no skeleton secreted : ActinosphcEriv/m Eidilnn'n'tl Ehrbg. The central matter contains numerous nuclei. ActinopJirys sol Ehrbg. of small size, with a single central nucleus. In the A<'antli»cnxti(l(e slender silicious spikes are found : Ai-tintJtoci/xtix Sjthtifera Greet!, with silicious spikes and needles. In Clatfii'iilhta there is a latticed silicious shell, and the body has a stalk : Chitliniliini eleg&ns 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
