. The biology of the Protozoa. Protozoa; Protozoa. 282 BIOLOGY OF THE PROTOZOA single cells of the colonies are built on the same plan as the Chlamy- domonadida? with 2 (rarely 4) equal flagella, non-metabolic body a simple contractile ^'acuole, chromatophores, stigmata and cellu- lose walls. Asexual reproduction occurs in the individual cells within the cellulose membranes and results, usuallv, in the formation of a new. -f ^ Fig. 136.— Volvox globator (A) and V. aureus (B, C, D). A, Sexually mature colony with eggs (e, macrogametes), and spermatozoids (); B, asexual colony with young aga
. The biology of the Protozoa. Protozoa; Protozoa. 282 BIOLOGY OF THE PROTOZOA single cells of the colonies are built on the same plan as the Chlamy- domonadida? with 2 (rarely 4) equal flagella, non-metabolic body a simple contractile ^'acuole, chromatophores, stigmata and cellu- lose walls. Asexual reproduction occurs in the individual cells within the cellulose membranes and results, usuallv, in the formation of a new. -f ^ Fig. 136.— Volvox globator (A) and V. aureus (B, C, D). A, Sexually mature colony with eggs (e, macrogametes), and spermatozoids (); B, asexual colony with young agamous daughter colonies; C, female colony with macrogametes; D, male colony, with many bundles of spermatozoids (microgametes). (From Oltmanns.) colony from each cell. In some cases all individuals of the colony thus reproduce the whole (Goniuvi, Spondylovwrvm, etc.) but in others the individual cells of the colony are differentiated into "somatic," and "generative" cells, the latter alone reproducing (Pleodorina, Volvox, etc.). Starting with the genus Spondyloniontm of the preceding family, the different colonial aggregates form a series of increasing com-. 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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Keywords: ., bookauthorcalkinsgaryngarynatha, bookcentury1900, bookdecade1920
