. A manual of zoology. Zoology. 17G PROTOZOA With few exceptions the Radiolaria possess skeletons of wonderful beauty; latticed spheres, sini;le or one within another, and bound together with radial rods (tig. Sq), frequently ornamented on the outer surface with spines, or latticed discs, helmet-like or cage-like structures (hg. u"). In other cases occur rings, tubes, spines, which meet in the central capsule (lig. 125), etc. In rare cases the skeleton is formed solely of organic substance (aianlJiiii); usually it is silicious and resistant. Skeletons of Radiolaria occur in rocks of vario
. A manual of zoology. Zoology. 17G PROTOZOA With few exceptions the Radiolaria possess skeletons of wonderful beauty; latticed spheres, sini;le or one within another, and bound together with radial rods (tig. Sq), frequently ornamented on the outer surface with spines, or latticed discs, helmet-like or cage-like structures (hg. u"). In other cases occur rings, tubes, spines, which meet in the central capsule (lig. 125), etc. In rare cases the skeleton is formed solely of organic substance (aianlJiiii); usually it is silicious and resistant. Skeletons of Radiolaria occur in rocks of various ages, as in Sicily, the Nicobars (both tertiary), and the Barbadoes. In reproduction there are numerous forms with a skeleton in which di\ision begins with a cleavage of the central cajisulc and usually extends through the extracapsulura. If this latter does not divide a colony results, in which a jelly ,li. y/ ^ ^JS^ ^^. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
