. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. GASTRIC TEETH. 149 Among the many instances in which teeth are converted to uses widely different from mastication, may be noticed that of the Squalls pristis, or Saw- fish, where the teeth are set horizontally on the two lateral edges of the upper jaw, which is prolonged in the form of a snout (seen in a, Fig. 293), obviously. -<rrrr^^ constituting a formidable weapon of offence, b is a more enlarged view of a portion of this instru- ment, seen from the
. Animal and vegetable physiology considered with reference to natural theology. Natural theology; Physiology; Plant physiology; Biology. GASTRIC TEETH. 149 Among the many instances in which teeth are converted to uses widely different from mastication, may be noticed that of the Squalls pristis, or Saw- fish, where the teeth are set horizontally on the two lateral edges of the upper jaw, which is prolonged in the form of a snout (seen in a, Fig. 293), obviously. -<rrrr^^ constituting a formidable weapon of offence, b is a more enlarged view of a portion of this instru- ment, seen from the under side. '§ 5. Trituration of Food in Internal Cavities. The mechanical apparatus, provided for triturating the harder kinds of food, does not belong exclu- sively to the mouth, or entrance into the alimentary canal; for in many animals we find this office per- formed by interior organs. Among the inferior classes we meet with examples of this conformation in the Crustacea, the MoUusca, and above all in Insects. Thus there is found in the stomach of the Lobster, a cartilaginous framework, in which are implanted hard calcareous bodies, having the form, and performing the functions of teeth. They are. 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 Roget, Peter Mark, 1779-1869. London : W. Pickering
Size: 2383px × 1049px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury18, booksubjectnaturaltheology, booksubjectphysiology
