Quarterly journal of microscopical science . Text-fig. c gives the details of thisdrama. It will be seen that the large amoeba at first attemptedto surround its prey (4, 5, and 6), and, after cutting off itsretreat, nearly succeeded in enclosing it (7 and 8). At 9 thesmall amoeba is not inside the large one, but underneath it. theAmo eba vesp er tilio having streamed over the Amoebalimax so as to hold it between itself and the glass. I haveoften seen Amoeba proteus capture Paramoecium andother Ciliates in the same manner. The Amoeba , was too nimble in this instance, for it escape
Quarterly journal of microscopical science . Text-fig. c gives the details of thisdrama. It will be seen that the large amoeba at first attemptedto surround its prey (4, 5, and 6), and, after cutting off itsretreat, nearly succeeded in enclosing it (7 and 8). At 9 thesmall amoeba is not inside the large one, but underneath it. theAmo eba vesp er tilio having streamed over the Amoebalimax so as to hold it between itself and the glass. I haveoften seen Amoeba proteus capture Paramoecium andother Ciliates in the same manner. The Amoeba , was too nimble in this instance, for it escaped again(10) and the large amoeba made no further attempt to captureit. A similar case has been described and figured by Jennings116), in which the amoeba also failed to secure its prey. Jen-nings concluded that the behaviour of the captor to the victimcould not be explained as the result of chemical or tactilestimuli only, but that there was a finely co-ordinated adapta-tion of the movements of the captor to those of the victim. TEXT-F[G Freehand sketches f the chase of an amoeba of the * Umax fyi><-by an Amoeba veBpertilio, and the partial ingestion amisubsequent escape f t>i, \ 686 GEOFFREY LAPAGE a conclusion with which I am entirely in agreement. Thebehaviour of Amoeba proteus in its capture of largeCiliata like Paramoecium and Colpidium in cultures strikinglysupports the same view (cf. also Schaeffer, 23). Penard (21, p. 700) has described another instance of thechasing of one amoeba by another which ended in the fusion ofthe two, and Leidy (18) has described and figured what isundoubtedly the successful capture and digestion of anAmoeba verrucosa by Amoeba proteus. Thislatter case is particularly interesting, since Leidy says that theA. verrucosa assumed, in the body of its captor, theappearance of a large sphere, still retaining its contractilevacuole unchanged . Later on the victim had becomepyriform and striate, and was then included in a large watervacuol
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