. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FEEDING MECHANISM OF MXEMIOPSIS. 77 This remarkable food catching apparatus of Mnemiopsis, in which the conveying system seems to foreshadow that of the bivalves, is certainly a great advance over that of the FIG. 9. Young Mnemiopsis Icidyi, 8 mm. high. i. Branched tentacle en- tirely retracted, but same as in Fig. 7. 2. Tentacular ridge. 3. Paragastric canal, termination shown with branches. 4. Mouth. 5. Beginning of labial ridge. 6. Developing auricles. Of its efficiency there can be no doubt, for compare Bigel
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FEEDING MECHANISM OF MXEMIOPSIS. 77 This remarkable food catching apparatus of Mnemiopsis, in which the conveying system seems to foreshadow that of the bivalves, is certainly a great advance over that of the FIG. 9. Young Mnemiopsis Icidyi, 8 mm. high. i. Branched tentacle en- tirely retracted, but same as in Fig. 7. 2. Tentacular ridge. 3. Paragastric canal, termination shown with branches. 4. Mouth. 5. Beginning of labial ridge. 6. Developing auricles. Of its efficiency there can be no doubt, for compare Bigelow's ('15) statement that the plankton was greatly diminished in a swarm of ctenophores. Nelson ('25) also brings forth evidence of a correlation between the abundance of Mnemiopsis lcld\i and the intensity of shipworm infestation and oyster sets. More- over, the fact that the ctenophores are usually found in such vast and dense swarms, argues well for their ability to obtain food. Possibly it is due to this efficient apparatus that we find in many species of ctenophores the small compact bodies and absence of long trailing tentacles. SUMMARY. The mode of feeding was studied in young tentacled forms and in the adult Mnemiopsis Icidyi. The young capture food with their branched tentacles, and deposit it in the mouth. The adults entangle the food with the small tentacles along the tentacular ridge, and deposit it in the labial trough, whence it is carried to the 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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