. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. io8 S. O. MAST. which is attempting to prey upon it, the trichocysts will of course be discharged from the injured region. But whether they really serve for defence seems questionable. Certainly the infusorian Didiniuni, which is the chief enemy of Paranicciuni, is not hin- dered in the least from seizing and devouring the animal by the discharge of trichocysts. It is possible that the discharge is really an expression of injury—a purely secondary, even patho- logical, phenomenon, like the formation of vesicles on the sur- f
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. io8 S. O. MAST. which is attempting to prey upon it, the trichocysts will of course be discharged from the injured region. But whether they really serve for defence seems questionable. Certainly the infusorian Didiniuni, which is the chief enemy of Paranicciuni, is not hin- dered in the least from seizing and devouring the animal by the discharge of trichocysts. It is possible that the discharge is really an expression of injury—a purely secondary, even patho- logical, phenomenon, like the formation of vesicles on the sur- face of an injured ; It would be of the greatest interest to study the feeding habits of Actinobolus, with special reference to the function of tricho- cysts, in the light of our present knowledge of their function in Paramecium. MECHANICS OF SWALLOWING. It is well known that Didinia can capture and swallow organ- isms which are relatively enormous in size. But it is difficult to obtain the maximum differences in size between the enemy and the victim, for both swim so rapidly that it is impossible to 16. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
