. The embryology of the honey bee. Honeybee; Bees. n6 THE EMBRYOLOGY OF 1 IE HONEY BEE StgGng ,B,r2 j -OpPI. 'SoeGng Fig. 38. Diagram of the nervous system of an embryo of Mantis, showing the head and first three trunk segments. From Viallanes. includes the greater portion of the brain and is made up of a pair of large lobes (Figs. 39-44, iBr) situated in the upper part of the head capsule. These lobes are somewhat ovoid in form, their larger ends directed caudad and slightly laterad; their smaller anterior ends lie close to the anterior wall of the head. Each lobe is somewhat compressed at ri
. The embryology of the honey bee. Honeybee; Bees. n6 THE EMBRYOLOGY OF 1 IE HONEY BEE StgGng ,B,r2 j -OpPI. 'SoeGng Fig. 38. Diagram of the nervous system of an embryo of Mantis, showing the head and first three trunk segments. From Viallanes. includes the greater portion of the brain and is made up of a pair of large lobes (Figs. 39-44, iBr) situated in the upper part of the head capsule. These lobes are somewhat ovoid in form, their larger ends directed caudad and slightly laterad; their smaller anterior ends lie close to the anterior wall of the head. Each lobe is somewhat compressed at right angles to the external sur- face. At their anterior ends the lobes are closely apposed to each other and are here united by a thin bridge of nerve fibres, the supraoesophageal commissure (Figs. 43 and 44, SupCom). Prob- ably some fibres from the second brain division, the deutocere- brum, also enter into this commissure. Each half of the protocerebrum of insects is typically divided into three lobes, which in many cases, as in the Dermaptera and Orthoptera (Fig. 38) are marked off from one another by thick- enings of the ectoderm forming the wall of the head 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
