. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B FIGURE 3. Rejection in Didcmnum moscleyi. In A, two vascular processes of the left- hand colony are extended on the right-hand colony. In B, disintegration occurred in the vascular processes and their surrounding test. Hctei'oc/cnetic combinations Using respective colonies of three species, Botryllus, Botrylloides and Sym- pleyma belonging to the Botryllinae mentioned before, heterogenetic or interspecific combinations were prepared. When the cut surfaces of the two colonies of different species were brought into con
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B FIGURE 3. Rejection in Didcmnum moscleyi. In A, two vascular processes of the left- hand colony are extended on the right-hand colony. In B, disintegration occurred in the vascular processes and their surrounding test. Hctei'oc/cnetic combinations Using respective colonies of three species, Botryllus, Botrylloides and Sym- pleyma belonging to the Botryllinae mentioned before, heterogenetic or interspecific combinations were prepared. When the cut surfaces of the two colonies of different species were brought into contact, no special phenomenon could be observed between them. In the same way, when the two colonies of different species were allowed to grow towards each other, neither fusion nor rejection was seen to occur between them. They simply competed with each other for the substratum to grow upon. Thus, contact between the two colonies of different species always resulted in indifference. DISCUSSION The results from the present experiments, together with those of Oka and Usui (1944) on Polycitor colonies, are summarized in Table I. In the reaction. 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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