. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECTS OF CASTRATION OF HEN-FEATHERED CAMPINES. 24! After castration this bird continued, as would be expected under any circumstances, to develop cock feathering. Its con- dition on Nov. 12, 1919, is shown in the photograph Fig. 6, B. The condition of the bird on March 6, 1920, is shown in Fig. 6, C. It was completely cock-feathered, but its comb was two thirds full size. The condition of the feathers is shown in Fig. 7, a2, b2, c2, d2. Before the operation June 17 the feathers were intermediate in character (a, b, c, d).
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECTS OF CASTRATION OF HEN-FEATHERED CAMPINES. 24! After castration this bird continued, as would be expected under any circumstances, to develop cock feathering. Its con- dition on Nov. 12, 1919, is shown in the photograph Fig. 6, B. The condition of the bird on March 6, 1920, is shown in Fig. 6, C. It was completely cock-feathered, but its comb was two thirds full size. The condition of the feathers is shown in Fig. 7, a2, b2, c2, d2. Before the operation June 17 the feathers were intermediate in character (a, b, c, d). The back and saddle feathers were somewhat pointed and the barring broken. After the operation (Sept. 13) the feathers that came in changed completely so that the bird became strictly cock-feathered. On. FIG. 8. A, normal hen-feathered male nearly one year old from the same flock as those operated on ; B, Campine hen from Wright's " New Book of ; March 2, 1920, the change was complete (a2, b-, c2, d2}. The bird was killed on March 6, 1920. Three very small pieces of testis were found on the right side; none on the left. The comb measured three and a half inches long and two inches high. Dr. Nonidez has sectioned the pieces of the testes and makes the following report. " The histological study of the three small pieces found in the region of the old testis showed that they are undergoing regeneration. The condition of the seminal tubules in these pieces contrasts with that of the tubules in the testes re- moved at the time of castration. While in the latter only sper- matogonia occur in the tubules, in the regenerating testis 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 r
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
