. Comparative anatomy and physiology. 378 COMPARATIVE ANATOMY AND PHYSIOLOGY. be functional as in the Coleoptera (beetles). In no case are they developed except on the second and third segments of the thorax (meso- and rneta- thorax). A wing consists essentially of two flattened. Fig. 160.—Skeleton of Butterfly's Wing. A, Costalvein; B, subcostal; m\ nfi, median branches ; ri r%,radial; si s5, subcostal branches; c, median vein ; D, submedian vein ; rfe. discocellular veinlet; in, internomedian veinlet; E, internal vein. (After Butler.) membranes, the presence of which is due to the organ
. Comparative anatomy and physiology. 378 COMPARATIVE ANATOMY AND PHYSIOLOGY. be functional as in the Coleoptera (beetles). In no case are they developed except on the second and third segments of the thorax (meso- and rneta- thorax). A wing consists essentially of two flattened. Fig. 160.—Skeleton of Butterfly's Wing. A, Costalvein; B, subcostal; m\ nfi, median branches ; ri r%,radial; si s5, subcostal branches; c, median vein ; D, submedian vein ; rfe. discocellular veinlet; in, internomedian veinlet; E, internal vein. (After Butler.) membranes, the presence of which is due to the organ arising in the form of a sac, which gradually becomes elongated and flattened out; through its substance there pass blood-vessels and air tubes, the walls of which are strengthened by chitin; the chitin may invade the rest of the wing, and convert it into a more. 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 Bell, F. J. (Francis Jeffrey), 1855-1924. London, Cassell
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1885
