. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 523 amphibians are permanent. The evidence for a similar condition in fishes and reptiles is most fragmentary and contradictory. Golovine (: 07, p. 864) has stated: "Cependant, durant tous ces changements nous n'avous jamais pu observer le mouvement des grains de pigment dans les paijjties interieures de cytoplasma, mouvement mentionne par BRtJCKE et; d' autre auteurs. " In a paper now in press it has been shown that in fresh pre- parations of the scales of the minnow, Fundulus heteroclitus, the migration of the pig
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 523 amphibians are permanent. The evidence for a similar condition in fishes and reptiles is most fragmentary and contradictory. Golovine (: 07, p. 864) has stated: "Cependant, durant tous ces changements nous n'avous jamais pu observer le mouvement des grains de pigment dans les paijjties interieures de cytoplasma, mouvement mentionne par BRtJCKE et; d' autre auteurs. " In a paper now in press it has been shown that in fresh pre- parations of the scales of the minnow, Fundulus heteroclitus, the migration of the pigment within the melanophores may be completely controlled by appropriate mixtures of sodium and potassium salts. It was a comparatively simple matter to carry out experiments similar to those of Kahn und Lieben (: 07).. V «iL^ i- ^ Fig. 3. The same melanophores reexpanded in a molecular sodium chloride solution. The processes are identical with those appearing in the first figure. In making these photographs no cover-glass was used. The illumination was by means of a single Nernst glower (110 volt). When scales are removed from the fish, the superficial melano- phores and xanthophores are seen to lie in the derma between the scale and the epidermis. The immersion of these scales in a 0,1 molecular sodium chloride solution produces a lasting expansion of the melanophores. A portion of the scale was now selected in which a melanophore had its processes in approximately the same plane. After carefully locating the cell upon the scale, which was easily- done by counting the number of growth rings, a photograph was taken of the expanded phase. The scale was then transferred to a mixture. 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 Anatomische Gesellschaft. Jena : G. Fischer
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherjenag, bookyear1913
