. The embryology of the honey bee. Honeybee; Bees. 96 THE EMBRYOLOGY OF THE HONEY BEE. Fig. 35. Profile drawings of eggs showing four stages in development, to illustrate the relative dimensions of the egg and chorion. Outlines drawn with camera lucida from fixed material. Amnion represented by dotted line. A, cleavage and 'blastoderm stages; B, Stage IV-V; C, Stage VI; D, Stage VIII, x 41. and C). These spaces are invaded by the amnion. A comparison of figures 35B and D shows that this second shortening of the egg is not only contemporaneous with the formation of the germ layers, but that it
. The embryology of the honey bee. Honeybee; Bees. 96 THE EMBRYOLOGY OF THE HONEY BEE. Fig. 35. Profile drawings of eggs showing four stages in development, to illustrate the relative dimensions of the egg and chorion. Outlines drawn with camera lucida from fixed material. Amnion represented by dotted line. A, cleavage and 'blastoderm stages; B, Stage IV-V; C, Stage VI; D, Stage VIII, x 41. and C). These spaces are invaded by the amnion. A comparison of figures 35B and D shows that this second shortening of the egg is not only contemporaneous with the formation of the germ layers, but that it is also accompanied by the curving of the germ band around the ends of the egg. It is therefore evident that the shortening which takes place has principally affected the yolk, and furthermore that the germ band itself has actually lengthened but little, if at all, between Stages IV and VIII. The embryo does not subsequently increase materially in length until immedi- ately before hatching, since eggs 70-73 hours old still show spaces of considerable size at their ends, between the embryo and the At the time of hatching, however, the young larva, after rupture of the chorion, increases greatly in length, as shown in figure XV. These changes in the length of the egg, with the exception of the initial shortening, are not explicitly mentioned by any of the previous investigators; nevertheless, the figures of both Biitschli. 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 Nelson, James Allen. Princeton : Princeton University Press
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectbees, bookyear1915
