. The biology of the Protozoa. Protozoa; Protozoa. SPECIAL MORPHOLOGY AND TAXONOMY OF SARCODINA 321 Order 3. Chalarothoraca, Hertwig and Lesser.—Body with a gel- atinous mantle containing spicules of silica or with a close-fitting skeleton of spicules, spines or plates. Typical genera: Pomyho- h/.rophri/s, Raphidiophri/s, Pinacocystis, LithicdUa, Acanthocystis, Diplocystis (I^g. 144). Order 4. Desmothoraca, Hertwig and Lesser—Body with skeleton shell of one piece j)erforated by numerous openings. Genus: Fig. 144.—Tjtdcs of spicules in Heliozoa, .4, Raphidiophrys pallida with curv
. The biology of the Protozoa. Protozoa; Protozoa. SPECIAL MORPHOLOGY AND TAXONOMY OF SARCODINA 321 Order 3. Chalarothoraca, Hertwig and Lesser.—Body with a gel- atinous mantle containing spicules of silica or with a close-fitting skeleton of spicules, spines or plates. Typical genera: Pomyho- h/.rophri/s, Raphidiophri/s, Pinacocystis, LithicdUa, Acanthocystis, Diplocystis (I^g. 144). Order 4. Desmothoraca, Hertwig and Lesser—Body with skeleton shell of one piece j)erforated by numerous openings. Genus: Fig. 144.—Tjtdcs of spicules in Heliozoa, .4, Raphidiophrys pallida with curved silicious spicules; B, Pinaciophora ruhiconda with tangential plates and forked spines; C, Acanthocystis turfacea, with separated plates and forked spines; D, Pinaciophora fluviatilis. (From Calkins after Penard.) Stb-C'lass n. RADIOLARIA, Haeckel. Broadly stated the Radiolaria are pelagic organisms of the same general type as the Heliozoa but offer many variations from the homaxonic symmetry of the latter. They are exclusively salt- water forms, surface dwelling for the most part, but may be found at great depths of the sea. Pseudo-alveoli are greatly elaborated and form foam-like spheres with radiating axopodia or with soft protoplasmic pseudopodia-like myxopodia, while complex skeletal elements of silica or strontium sulphate afford the greatest variety of structures and designs. A typical radiolarian may be conceived by imagining a resistant 21. 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
Size: 1598px × 1563px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcalkinsgaryngarynatha, bookcentury1900, bookdecade1920
