. An introduction to the study of mammals living and extinct. Mammals. 725 Their digestive organs are much modified, the stomach attaining an extraordinary complexity, which may be described as follows. An ordinary stomach must be supposed to be immensely elongated, and gradually tapering from the cardiac end to a very prolonged, narrow, pyloric extremity. Then two longitudinal muscular bands, â corresponding in situation to the greater and lesser curvatures of an ordinary stomachâthe former commencing just below the fun- dus, and the latter at the cardiac orifice, and both pro
. An introduction to the study of mammals living and extinct. Mammals. 725 Their digestive organs are much modified, the stomach attaining an extraordinary complexity, which may be described as follows. An ordinary stomach must be supposed to be immensely elongated, and gradually tapering from the cardiac end to a very prolonged, narrow, pyloric extremity. Then two longitudinal muscular bands, â corresponding in situation to the greater and lesser curvatures of an ordinary stomachâthe former commencing just below the fun- dus, and the latter at the cardiac orifice, and both proceeding towards the pylorusâare de- veloped, so as to pucker up the cavity into a number of pouches, exactly on the same principle as the human colon is puckered up by its three longitudinal bands. These pouches are largest and most strongly marked at the â oesophageal end, and becoming less and less distinct, quite cease several inches before the pylorus is reached, the last part of the organ being a simple smooth- walled tube. The fundus, or cardiac end of the stomach, is formed by a single large sac, slightly constricted on its under surface by the prolongation of the inferior longitudinal band, or that corresponding to the great curvature. The oesophagus enters into the upper part of the left, or pyloric end of this sac, or rather at the point of junction between it and the second (also a very large) sacculus. Furthermore, the whole of this elongated sacculated organ is, by the brevity, as it were, of the lesser curva- ture, coiled upon itself in an irregularly spiral manner, so that when in situ the pylorus comes to be placed very near the oesophageal entrance. Nasalis}âSkull resembling that of the Oemijiitlnrincc in that the lower border of the nasal bones extends considerably below the lower border of the orbits, whereas in the other Sniiiiiijiiihccinu'. the aperture of the nares extends upwards between the orbits. Nose 1 Geoffro)', Ann. du Masium, vol. xix, p. 90 (
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Keywords: ., bookauthorly, bookcentury1800, bookdecade1890, booksubjectmammals
