. The microscope and its revelations. oaires dEau Douce, in vol. ix. of Ar<:Ji. - • • : leso ;1•() by M. E. Pennrd, who calls itMyriophrys paradoxa. :; H 738 MICROSCOPIC FORMS OF ANIMAL LIFE—PROTOZOA but it is supplied with nourishment by the instrumentality of itspseudopodia, its food being derived not merely from vegetable par-ticles, but from various small animals, some of which (as the young ofEntomostraca) possess great activity as well as a comparatively highorganisation. When one of these happens to come into contact wit!ione of the pseudopodia (which have firm axis-filaments (
. The microscope and its revelations. oaires dEau Douce, in vol. ix. of Ar<:Ji. - • • : leso ;1•() by M. E. Pennrd, who calls itMyriophrys paradoxa. :; H 738 MICROSCOPIC FORMS OF ANIMAL LIFE—PROTOZOA but it is supplied with nourishment by the instrumentality of itspseudopodia, its food being derived not merely from vegetable par-ticles, but from various small animals, some of which (as the young ofEntomostraca) possess great activity as well as a comparatively highorganisation. When one of these happens to come into contact wit!ione of the pseudopodia (which have firm axis-filaments (ax) clothedwith a granular sarcode), this usually retains it by adhesion ; but themode in which the particle thus taken captive is introduced into thebody differs according to circumstances. If the prey is large andvigorous enough to struggle to escape from its entanglement, it mayusually be observed that the neighbouring pseudopodia bend over and cp 1). FIG. 573.—Actinoplirys sol: A, figure showing the wide vaeuolated corticallayer or ectosarc (E) and the fine granulated endosarc (M) ; •», centralnucleus, oa1, axial filaments of pseudopodia; cr, contractile vacuole ; N, food-mass inclosed in a large food-vacuole. B, a colony of four individuals, aftertreatment with acetic acid ; K, M, and N, as before ; v, v, vacuoles. C, a cyst;z, c, outer and inner envelopes. D, a burst cyst from which the young isescaping, though still inclosed by the inner envelope. (From Biitschli,after Grenadier, Stein, and Cienkowsky.) apply themselves to it, so as to assist in holding it captive, and that itis slowly drawn by their joint retraction towards the body of itscaptor. Any small particle nol capable of offering active resistance,on the other hand, may be seen after a little time to glide towardsthe central body along the edge of the pseudopodium, without anyvisible movement of the latter, much in the same manner as in in either of
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
