. Behavior of the lower organisms. Animal behavior; Invertebrates. REACTIONS OF INFUSORIA TO ELECTRIC CURRENT 153 3 p E-g â¢' 5-3 «. » â (a 52. 3 3 5 3 --' ⢠B £â _. R. 3 rr p I 3- e S 2. «â "> Q re - = ⢠â o o i 11 P <t w . a â ;⢠p ? ^ " p 2 (s S o« 3 Q 11 p S -1 -<" ⢠P-P TO g â, g 3 n> 3 a, rt R _, tn re O e p"~ £-Q « © 5" 3^ -^ re o TO (to 4^ Lfi re re 3 5 "' P in e of re o r* O a 3 3 3 re to p ?rt g O *â re 2 tn 3 â¢g v ~ 5. g - & § 8 3 g'w ft q p 1 §⢠g£ ⢠s 3 3 £ ,q" ur o â 3- 3" <j â. ** B' R ~ 5 9 !â g 5&quo
. Behavior of the lower organisms. Animal behavior; Invertebrates. REACTIONS OF INFUSORIA TO ELECTRIC CURRENT 153 3 p E-g â¢' 5-3 «. » â (a 52. 3 3 5 3 --' ⢠B £â _. R. 3 rr p I 3- e S 2. «â "> Q re - = ⢠â o o i 11 P <t w . a â ;⢠p ? ^ " p 2 (s S o« 3 Q 11 p S -1 -<" ⢠P-P TO g â, g 3 n> 3 a, rt R _, tn re O e p"~ £-Q « © 5" 3^ -^ re o TO (to 4^ Lfi re re 3 5 "' P in e of re o r* O a 3 3 3 re to p ?rt g O *â re 2 tn 3 â¢g v ~ 5. g - & § 8 3 g'w ft q p 1 §⢠g£ ⢠s 3 3 £ ,q" ur o â 3- 3" <j â. ** B' R ~ 5 9 !â g 5" ^ re re p w 3 < C TO ^ S-re ^-P5 es " »Q «â "~ p c sr '" re orientation takes place varies in different species. The direct effect of the current is, as in Paramecium, to cause the cilia on the cathode side to strike forward, while those on the anode side strike backward. This would result, taken by ^ ^ » 5. g ~ 3 itself, in turning the animals directly, by the shortest path, toward the cathode. But in many species, as our study of the reactions to other stimuli has shown us, there is a strong tendency to turn toward one side rather than the other, usually toward the aboral side, â that oppo- site the peristome. The cilia of the peristome are usually more powerful than those of the remainder of the body, so that the direction in which the animal turns depends largely upon the way these cilia strike. When the peris- tomal cilia strike strongly backward, the organism turns toward the opposite or aboral side, with little regard to the beat of the remainder of the cilia. These peristo- mal cilia are as a rule lim- ited to one of the four quarters into which the sur- face of the body can be di- vided, as illustrated in Fig. 100. They, of course, beat backward when either the end bearing them, or the side bearing them, is directed toward the anode (1-3, Fig. 100), so that in these positions the animal t
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanimalbehavior, booky
