. Zoology. Zoology. 19 In swimming, tlie monad stretches out the wliip-lasli-like appendage called tlie f!(if/eJIiini, which vibrates with an nn- dulating, whirling motion, ami ])roduces a peculiar graceful rolling motion of the monad. When the monad is fixed the flagellnm is nsed to convey food to the month, which lies between the base of the flagellnm and beak, or ";' The food is tlu'own b}'a sudden jerk, and with precision, directly against the month. "If acceptable for food, the flagellnm presses its base down npon the morsel, and at tlie same time the lip is t
. Zoology. Zoology. 19 In swimming, tlie monad stretches out the wliip-lasli-like appendage called tlie f!(if/eJIiini, which vibrates with an nn- dulating, whirling motion, ami ])roduces a peculiar graceful rolling motion of the monad. When the monad is fixed the flagellnm is nsed to convey food to the month, which lies between the base of the flagellnm and beak, or ";' The food is tlu'own b}'a sudden jerk, and with precision, directly against the month. "If acceptable for food, the flagellnm presses its base down npon the morsel, and at tlie same time the lip is thrown back so as to disclose the mouth, and then bent over the particle as it sinks ^'?he7ihSaV"yiari into the latter. When the lip has ob- ^rstatel'vithZ'S: taincd a fair hold upon the food, the omThead"""ok£ flagellnm withdraws from its incumbent o, anterior end; h, position and returns to its former rigid, hinder part of the ' 6 ' body; c, iiuch'us. ^vatcliful Condition. The process of de- Highlj-magnified. , ,â ,â ⢠,, ⢠i i ,- 1 i ghitition IS then earned on by tne help of the lip alinie, wliieli cxjiands latterly until it completely overlies the particle. All tliis is done quite rap- idly, in a few seeomls, ami then the food glides q'I quickly into the deptlis of tlie liody, and is envel- oped in a digestive vacuole, whilst the lip assumes its usual conical shape and ]ii'; (Clark.) Fre 8-U- Some momids arc attached by a slender stalk to fl''"tiiate '-''^ leaves and stems of aquatic jilants, and these infusori- are usuallv collected into comiionnd monads Sev- an, or . â ' monad, cral arising Irom a. common st;ilk. In such cases ^vith two ,, ,, -iT-i 1 1, large ci- the liody With its nucleus and two or three con- fiag'Sia': tractile vesicles is snrinounted bv a delicate collar Greatly - - - ' ' ni a g n 1- ; out of which the lash (flagellnm) iirojcets. Jlonads multiidy (1) either by self-division, or('^) by the p
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1897
