. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 18 IJ^VEKTEBHATE MOHPHOLOO Y. i of protoplasm traverse the pseiidopodia as in the Foramiuifera and carry the food-particles to the body proper. This has a delicate ectoplasm and a central endoplasm which is fre- quently highly vacuolated and contains one or more nuclei. Fig. 6.—Actinospharium Eichliornii (after Leidy), cv and cv' = coutnictile vacuoles. //= iugesled food, ef= t'gested food. j)s = pseiidopodium. and contractile vacuoles. In some forms also a skeleton is
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 18 IJ^VEKTEBHATE MOHPHOLOO Y. i of protoplasm traverse the pseiidopodia as in the Foramiuifera and carry the food-particles to the body proper. This has a delicate ectoplasm and a central endoplasm which is fre- quently highly vacuolated and contains one or more nuclei. Fig. 6.—Actinospharium Eichliornii (after Leidy), cv and cv' = coutnictile vacuoles. //= iugesled food, ef= t'gested food. j)s = pseiidopodium. and contractile vacuoles. In some forms also a skeleton is developed; it reaches its most perfect form in the stalked ClathruUna, in which it consists of a delicate fenestrated siliceous sphere. 3. Order Radiolaria. The Radiolaria are exclusively marine and are the most complicated of all the Rhizopods. Their pseudopodia re- semble closely those of the Heliozoa, being slender and pos- sessing an axial support. The bodj'^ varies in shape somewhat in accordance with the shape of the siliceous shell with which almost all the forms are provided. In those forms in which the shell is simplest, as in Thalassicolla (Fig. 7), where it is in reality absent, the body is spherical and is clearly diflferen- tiated into two regions, not, however, corresponding to the ectoplasm and endoplasm of other Rhizopods. The centre of. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. New York : H. Holt
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