. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. of many true vegetable feeders in some remote orders, and in Plecotus (Jig. 288), as complete Fig. an identity with that of the carnivorous type. In the former the oesophagus swells out before it enters the general cavity, and that dilatation, as Home observes, appears, from its structure, to belong to the stomach. To the left of the cesophagus th6re are two dilatations, the far- thest of which has a smooth surface and thin coats ; the other is furnished with several deep longitudinal rugae, some of which are con-
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. of many true vegetable feeders in some remote orders, and in Plecotus (Jig. 288), as complete Fig. an identity with that of the carnivorous type. In the former the oesophagus swells out before it enters the general cavity, and that dilatation, as Home observes, appears, from its structure, to belong to the stomach. To the left of the cesophagus th6re are two dilatations, the far- thest of which has a smooth surface and thin coats ; the other is furnished with several deep longitudinal rugae, some of which are con- tinued from similar ones in the cesophagus. Four of the rugse are continued towards the pylorus, giving a direction to the food in that course; about one-third of the stomach to- wards the pyloric extremity is turned back upon itself, and the pylorus is consequently placed externally close to the entrance of the cesophagus. At the pylorus is a veiy small opening into the intestine, which when con- tracted seems scarcely pervious to air. Such is the complicated form of the stomach in the frugivorous division ; whilst that of the insect- feeders is as simple as possible, being only divided into a cardiac and a pyloric portion with scarcely the slightest contraction. The intestines present a no less marked distinction. In the Pteropus they are no less than seven times the length of the body, whilst Vesper- tiliu noctula offers the shortest proportional length of the canal, it being only twice as long as the body. The latter is also wholly devoid of a icccum. The organs of generation.—The male organs of the Bats bear a near relation to those of the Quadrumana and of Man, in some striking respects. The penis is pendulous, and the proportions between the different organs are not very dissimilar; but the testes do not descend from the abdomen excepting during the breeding season, when they are found on each side of the anus, whilst the large epididymis is seen just behind them, on
Size: 1650px × 1515px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
