. Carnegie Institution of Washington publication. II. Section of I'hotinus pyralis. P = Ill III. Transverse section of Pholinus pyralis (dia- grammatic). The right-hand half shows the arrangement and distribution of the tracheae, while the left-hand half shows the modification of the luminous tissue at the point of attachment of the breath- ing muscles. G, testes; /, intestine; L, true photogenic tissue; R, reflecting layer; 5. spiracle or stigmatum; Sp, spiral organs (function uncertain); T, main tracheae to photogenic organ; Tb, main respiratory trachea;; M, muscle fibers. Fig. 4.
. Carnegie Institution of Washington publication. II. Section of I'hotinus pyralis. P = Ill III. Transverse section of Pholinus pyralis (dia- grammatic). The right-hand half shows the arrangement and distribution of the tracheae, while the left-hand half shows the modification of the luminous tissue at the point of attachment of the breath- ing muscles. G, testes; /, intestine; L, true photogenic tissue; R, reflecting layer; 5. spiracle or stigmatum; Sp, spiral organs (function uncertain); T, main tracheae to photogenic organ; Tb, main respiratory trachea;; M, muscle fibers. Fig. 4. This description seems a little fantastic, for optically the system is extremely inefficient. The low reflecting power which must obtain in the so-called "reflecting layer" and the roundabout way for the light to reach. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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