. Outlines of zoology. Zoology. NERVOUS SYSTEM. 295 Moulting, which involves a casting of the cuticle, of the internal lining of the tracheae, &c., occurs some seven times before the cockroach attains in its fifth year to maturity. i:\i& muscles, which move the appendages, and produce abdominal movements essential to respiration, are markedly cross striped. Nervous System.—^A pair of supra-oesophageal or cerebral ganglia lie united in the head. As a brain, they receive. Fig. 95.—Mouth appendages of Cockroach. (After DUFOUR.) I. Mn, Mandibles; II. First Maxillae; c, cardo; j/, stipes; Z
. Outlines of zoology. Zoology. NERVOUS SYSTEM. 295 Moulting, which involves a casting of the cuticle, of the internal lining of the tracheae, &c., occurs some seven times before the cockroach attains in its fifth year to maturity. i:\i& muscles, which move the appendages, and produce abdominal movements essential to respiration, are markedly cross striped. Nervous System.—^A pair of supra-oesophageal or cerebral ganglia lie united in the head. As a brain, they receive. Fig. 95.—Mouth appendages of Cockroach. (After DUFOUR.) I. Mn, Mandibles; II. First Maxillae; c, cardo; j/, stipes; Z, lacinia ; G, galea; , maxillary palp; III. Second Maxillae or Labium ; , submentum ; ?;z, mentuni ; L, lacinias ; pg, para- glossa ; /./, labial palp. impressions by antennary and optic nerves. By means of a paired commissure surrounding the gullet, they are connected with a double ventral chain of ten ganglia. Of these, the first or sub-oesophageal pair are large, and give off nerves to the mouth parts, &c.; from each of the ganglia of the thorax and the abdomen nerves are given off to adjacent parts. There are three pairs of ganglia in the thorax, and six. 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 Thomson, J. Arthur (John Arthur), 1861-1933; Newbigin, Marion I. (Marion Isabel), 1869-1934; Smith, Preserved, 1880-1941. fmo. New York, D. Appleton & Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
