. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 122 JOHN H. POSTLETHWAIT TABLE I The effect of implanted parts of first instar larvae upon Metamorphosing Drosophila virilis hosts Implant Age of implant Number of recovered hosts Number of hosts with aberrant cuticle above implant Anterior third Fir>t instar 84 17 (20%) Posterior third First instar 87 1 (!',) Anterior third minus brain-ring gland complex First in>tar 99 5 (5%) Brain-ring gland complex First instar 74 14 (19', ) Imaginal disc Third instar 48 0 (.(»' , ) melanogaster were used as donors and hosts. The d
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 122 JOHN H. POSTLETHWAIT TABLE I The effect of implanted parts of first instar larvae upon Metamorphosing Drosophila virilis hosts Implant Age of implant Number of recovered hosts Number of hosts with aberrant cuticle above implant Anterior third Fir>t instar 84 17 (20%) Posterior third First instar 87 1 (!',) Anterior third minus brain-ring gland complex First in>tar 99 5 (5%) Brain-ring gland complex First instar 74 14 (19', ) Imaginal disc Third instar 48 0 (.(»' , ) melanogaster were used as donors and hosts. The data for both were similar, but were more extensive for D. t'irilis, and so these appear in Table I. When abdomens of adult hosts were examined under the compound micro- scope, abnormalities were evident in 17 (20 per cent) of the 84 abdomens that had been implanted with the anterior third of first instar donors. Only 1 abnormality was encountered among 87 abdomens that had received the posterior third of first instar larvae. The abnormalities were localized in the cuticle immediately overlying the implant; they were encountered only when the implant was superficial, never when it was deeply imbedded in the abdomen. As illustrated in Figure 1, the « r MM I Ml\,f ' III 7 In 1 ttl \\- AC I / ' L A. 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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