. The biology of the Protozoa. Protozoa; Protozoa. INTRODUCTION 31 (2) Membranes, Shells and Skeletons as Form-determining Factors.â While density or consistency oi the protoplasm is thus one of the factors determining form in Protozoa, its effect in the majority of types is offset by the presence of definite membranes, shells, tests, â Â¥ \ yf .-â '/fiiiiir::. Fig. 9.âAllogromia oviforme, foramiiiiferon with chitinous monothalamous shell and reticulose pseudopodia. (D) a recently captured diatom; (S) chitinous shell. (From Calkins after M. Schultze.) and skeletons; by specialized protoplas
. The biology of the Protozoa. Protozoa; Protozoa. INTRODUCTION 31 (2) Membranes, Shells and Skeletons as Form-determining Factors.â While density or consistency oi the protoplasm is thus one of the factors determining form in Protozoa, its effect in the majority of types is offset by the presence of definite membranes, shells, tests, â Â¥ \ yf .-â '/fiiiiir::. Fig. 9.âAllogromia oviforme, foramiiiiferon with chitinous monothalamous shell and reticulose pseudopodia. (D) a recently captured diatom; (S) chitinous shell. (From Calkins after M. Schultze.) and skeletons; by specialized protoplasmic differentiations; or by foreign bodies. Thus the density of the sluggish Pclomyxa pulustris is due to the enormous number of crystals of mud and sand, shells of diatoms and peculiar refractile bodies resembling glycogen in. 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
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