. Annals of natural history. Natural history; Botany; Zoology; Geology. 308 Prof. Owen (m the Structure of the Pearly Nautilus. distinct fasciculi from the dense celhdar tissue (fig. 2. h), sur- rounding the nerve in the centre of the tentacle (fig. 2. d), and radiate at equal distances to the circumference; they divide and subdivide as they diverge, and also send off lateral fibres, which form a delicate network in the interspaces of the rays, especially at the angles : the meshes include the longitudinal fasciculi, the cut ends of which are shown at c, fig. 2. " The mechanical arrangeme
. Annals of natural history. Natural history; Botany; Zoology; Geology. 308 Prof. Owen (m the Structure of the Pearly Nautilus. distinct fasciculi from the dense celhdar tissue (fig. 2. h), sur- rounding the nerve in the centre of the tentacle (fig. 2. d), and radiate at equal distances to the circumference; they divide and subdivide as they diverge, and also send off lateral fibres, which form a delicate network in the interspaces of the rays, especially at the angles : the meshes include the longitudinal fasciculi, the cut ends of which are shown at c, fig. 2. " The mechanical arrangement of the contractile fibres is very similar to that of the complex muscles described by Cuvier in the proboscis of the elephant. The attenuation and elongation of this brobdignagian tentacle must be effected without compress- ing the central breathing-tubes, and the transverse fibres accord- ingly radiate from the dense ligamentous tissue which surrounds the tubes : the same prospective contrivance is manifested to pre- vent the compression of the nerves and vessels in the muscular system of the ninety proboscides of the Nau- tilus. " The papillae upon the exterior surface of the two large confluent di- gital processes forming the hood, and of the two hollow digitations next in size immediately beneath them, form a remarkable character in the Nau- tilus, on account of their obvious similarity to tactile papillae; but the sense of touch must be specially ex- ercised by the numerous cephalic Fig. 2. 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 [S. l. : s. n. ]
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