Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 FIG. 76.—Alimentary canal and nervous system of Mesosto- mum Ehrenbergi (after Graff). G, the paired cerebral ganglia •with two eye-spots; St. one of the two main lateral nerves ; Z>,alimentary canalwith mouth ami pharynx. fi1 C' \ FIG. 77.—Nervous system of FIG. 78.—Nervous system the larva of Coccinella (after Ed. Brandt). G, su- pra-03sophageal ganglion or brain; Gfr, frontal ganglion; Sg, subreso- phageal gan
Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 FIG. 76.—Alimentary canal and nervous system of Mesosto- mum Ehrenbergi (after Graff). G, the paired cerebral ganglia •with two eye-spots; St. one of the two main lateral nerves ; Z>,alimentary canalwith mouth ami pharynx. fi1 C' \ FIG. 77.—Nervous system of FIG. 78.—Nervous system the larva of Coccinella (after Ed. Brandt). G, su- pra-03sophageal ganglion or brain; Gfr, frontal ganglion; Sg, subreso- phageal ganglion ; &',-&', the eleven ganglia of the yentral chain of thorax and abdomen. of adult Coccinella (after Ed. Brandt). Ag, optic ganglion. The other let- ters as in fig. 77. (Gephyrea) or of a ventral chain of ganglia, which may have a homonomous (Annelids) or heteronomous (Arthropods) arrangement (figs. 77 and 78). The concentration of the nervous system begun f»
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