. Elements of comparative anatomy. Anatomy, Comparative. Fig. liO. Pupa of the same Insect. Fig. 111. Its imago. % Head. 2, 3, 4 Thoracic segments. 5-13 Abdominal segments. V Fore-gut. M Mid-gut. E Hind-gut. gs Cerebral ganglion, gi Sub-cesophageal ganglion. u Ventral ganglion. vm Malpighian vessels. C Heart. Q Generative organs (after Newport). off from the hind-gut by a constriction; this latter is almost always widened, it is pretty long in the Scorpionea, but shorter in Galeodcs, where it has a ca3cal sac. In the Aranea also, and in the Acarina, the hind-gut (Fig. 137, r) is of a considera
. Elements of comparative anatomy. Anatomy, Comparative. Fig. liO. Pupa of the same Insect. Fig. 111. Its imago. % Head. 2, 3, 4 Thoracic segments. 5-13 Abdominal segments. V Fore-gut. M Mid-gut. E Hind-gut. gs Cerebral ganglion, gi Sub-cesophageal ganglion. u Ventral ganglion. vm Malpighian vessels. C Heart. Q Generative organs (after Newport). off from the hind-gut by a constriction; this latter is almost always widened, it is pretty long in the Scorpionea, but shorter in Galeodcs, where it has a ca3cal sac. In the Aranea also, and in the Acarina, the hind-gut (Fig. 137, r) is of a considerable width. Fig. 13'J. Larva of a & o i n Lepidopterous Insect V -'^V. (Sphinx ligustri) ; seen . from the side. The Mynapoda and lnsecta agree m the mode of arrangement of the chief tracts of their digestive system ; which at the same time closely resembles what obtains in Peripatus. Of the three divisions of the digestive tube the fore-gut only prepares the food, and the mid-gut has the principal share in digesting it. As a rule it forms the longest. 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 Gegenbaur, C. (Carl), 1826-1903; Bell, F. J. (Francis Jeffrey), 1855-1924; Lankester, E. Ray (Edwin Ray), Sir, 1847-1929. London, Macmillan and Co.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectanatomycomparative
