. The Protozoa. Protozoa. Fig. 17. — Types of cysts. A. Amasba proteus. [SCHEEL.] B. Stylonychia mytilus Ehr. [BiJTSCHLI.] C. Pleurotricha grandisSt. [BUTSCHLI.] D. Euglypha alveo/aiaDuj. [Leidy.] E. Actinospharium [BUTSCHLI.] F. Colpoda Steinu. [MAUPAS.] a, gelatinous matrix; i, outer cyst wall; c, middle cyst wall; d, inner cyst wall. the cell draws in its appendages, rounds out into a sphere and secretes a resisting membrane, within which it can exist for a long period. When first formed, this membrane is a delicate gelatinous substance, which soon hardens and gradually acquires t
. The Protozoa. Protozoa. Fig. 17. — Types of cysts. A. Amasba proteus. [SCHEEL.] B. Stylonychia mytilus Ehr. [BiJTSCHLI.] C. Pleurotricha grandisSt. [BUTSCHLI.] D. Euglypha alveo/aiaDuj. [Leidy.] E. Actinospharium [BUTSCHLI.] F. Colpoda Steinu. [MAUPAS.] a, gelatinous matrix; i, outer cyst wall; c, middle cyst wall; d, inner cyst wall. the cell draws in its appendages, rounds out into a sphere and secretes a resisting membrane, within which it can exist for a long period. When first formed, this membrane is a delicate gelatinous substance, which soon hardens and gradually acquires the peculiar characters of chitin. With the exception of the contractile vacuole, which continues to contract rhythmically for some time, all of the organs of the body are quiet at this period. The water, expelled by the vacuole, collects between the cyst and the spherical wall of the animal, the latter. 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. New York, The Macmillan company; London, Mamcillan & co. , ltd.
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Keywords: ., bookauthorcalkinsg, bookcentury1900, bookdecade1900, bookyear1901
