. The biology of the Protozoa. Protozoa; Protozoa. '/'S 0': B Fig. 132.—Polykrikos schwartzi and development of its nematocysts. (After Chatton.) in resting phases differs according to the species and varies in permanent and temporary resting conditions; sometimes it occurs within the parent shell, in other cases the outer shell is discarded before division. Multiple division is widespread especially in quiescent reproduc- tive forms protected by gelatinous membranes or cysts; the latter are sometimes drawn out into peculiar crescentic capsules within which the individual divides to form sever
. The biology of the Protozoa. Protozoa; Protozoa. '/'S 0': B Fig. 132.—Polykrikos schwartzi and development of its nematocysts. (After Chatton.) in resting phases differs according to the species and varies in permanent and temporary resting conditions; sometimes it occurs within the parent shell, in other cases the outer shell is discarded before division. Multiple division is widespread especially in quiescent reproduc- tive forms protected by gelatinous membranes or cysts; the latter are sometimes drawn out into peculiar crescentic capsules within which the individual divides to form several products. Gymnndi- 18. 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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