. The microscope and its revelations. FIG. 571.—Gromia oviformis, with itspseudopodia extended. 1 Ueber Microyromia, in Arcltiv fiir Mikr. Aunt. bd. x. Supplement. 736 MICROSCOPIC FORMS OF ANIMAL LIFE—PROTOZOA has the curious habit of uniting with neighbouring individuals by thefusion of the pseudopodia, into a common • colony, the individualssometimes remaining at a distance from one another as at A, butsometimes aggregating themselves into compact masses as at B. Thenearly globular thin calcareous shell is prolonged into a short neckhaving a circular orifico, from which the sarcode-bocly ext
. The microscope and its revelations. FIG. 571.—Gromia oviformis, with itspseudopodia extended. 1 Ueber Microyromia, in Arcltiv fiir Mikr. Aunt. bd. x. Supplement. 736 MICROSCOPIC FORMS OF ANIMAL LIFE—PROTOZOA has the curious habit of uniting with neighbouring individuals by thefusion of the pseudopodia, into a common • colony, the individualssometimes remaining at a distance from one another as at A, butsometimes aggregating themselves into compact masses as at B. Thenearly globular thin calcareous shell is prolonged into a short neckhaving a circular orifico, from which the sarcode-bocly extends itself,. FK;. 572.—Microgroiiiia social is . A, colony of individuals in extended state,some of them undergoing transverse fission; B, colony of individualsKoine of them separated from the principal mass) in compact state ; C, D,formation and escape of swarm spore, seen free at E. giving off very slender pseudopodia which radiate iii all distinct nucleus can be seen in the deepest part of the cavity;while a contractile vesicle lies imbedded in the sarcodic substancenearer the mouth. Multiplication by duplicative subdivision hasbeen distinctly observed in this tvpe ; but with a peculiar departure HELIOZOA 737 from the usual method. A T ran-verse con strict ion divides the l>;>dyinto two halves—as shown in two individuals of colony A—each halfpossessing its own nucleus and contractile vesicle; the posterior >eg-ment. which at first lies free at the bottom of the cell, then pressesforwards towards its orifice, as shown at C, and finally, by amoeboidmovements, escapes f
Size: 1429px × 1748px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
