. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. NERVES OF REPTILES. 309 to form the 'ramus ventriilis,' v. The filament of the ventral root sent to the ramus dorsalis of the succeeding nerve perforates the lower division of the dorsal root of its own ner^'e. Thus each spinal nerve forms a ' ramus dorsalis,' fig. 205, lo, and a ' ramus ventralis,' ib. 8; the ramus dorsalis includes a sensory filament of its own nerve, and a motory filament of the antecedent ner^'c: the ' ramus ventralis' is fijrmed by a motory. A" â¢â¢ - ' '-*»:" T ^zs^t^^jS^"^"&qu
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. NERVES OF REPTILES. 309 to form the 'ramus ventriilis,' v. The filament of the ventral root sent to the ramus dorsalis of the succeeding nerve perforates the lower division of the dorsal root of its own ner^'e. Thus each spinal nerve forms a ' ramus dorsalis,' fig. 205, lo, and a ' ramus ventralis,' ib. 8; the ramus dorsalis includes a sensory filament of its own nerve, and a motory filament of the antecedent ner^'c: the ' ramus ventralis' is fijrmed by a motory. A" â¢â¢ - ' '-*»:" T ^zs^t^^jS^"^"" ''' JO'' \ *;?⢠'â **^5^>^ LnLeral ucvve ami IjraucljeB, Cod. LTV. and a sensory filament of its own nerve; both rami ' A'enti-ales' and ' dorsales ' are associated together, and with the vagal and trigeminal nerves through the medium of the great ' nervus lateralis,' fig. 205, i, 8. The dorsal roots of the nerves distributed to the free, explora- tory, pectoral rays of the Gurnards, rise from special ganglionic swellings of the cervical portion of the dorsal myelonal columns. § 56. Nerves of Rejjtiles.â The olfiictory nerves are continued in Reptiles, for a greater or less extent, from the rhinencephalon, figs. 188, 191, to the olfactory sacs; the white and grey tracts beneath the proscnceiihalon, fig. 190, p, descrilied as roots of this nerve, belong to the rluncncephalic crura: the true olfactory nerves are less distinct from their centres than in other Ver- tebrates. In the Python, fig. 188, the nerves, i, of equal diameter with their centres, gradually expand, by resolution of their fibres, as they aj^proach the olfactory sacs, ib. d, and are joined by part of the first division of the ' fifth.' The olfactory. 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 Owen, Richard, 18
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