. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 628 SKELETON. and the neural arches (2).—They are " exo- ; Now the thoracic rib (4- of A) is also the true homologue of the lumbar mis- named and mistaken " transverse" process (4 of B), for both these structures are iden- tical in every respect: 1st, they hold the same serial order ; 2d, they are posited in the same situation with respect to the other ver- tebral elements ; 3d, they are autogenous ; 4th, the so called " transverse process " (4) of the lumbar vertebra (B) is that very
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 628 SKELETON. and the neural arches (2).—They are " exo- ; Now the thoracic rib (4- of A) is also the true homologue of the lumbar mis- named and mistaken " transverse" process (4 of B), for both these structures are iden- tical in every respect: 1st, they hold the same serial order ; 2d, they are posited in the same situation with respect to the other ver- tebral elements ; 3d, they are autogenous ; 4th, the so called " transverse process " (4) of the lumbar vertebra (B) is that very struc- ture which occasionally presents to us in arti- cular costal form and function as seen in 4- of F, fig. 444., thereby more closely he- coming assimilated to the thoracic rib of the dorsal vertebra ; 5th, by negative evidence it may be shown that the thoracic rib (4 of A) is the true homologue of the so named trans- verse process (4) of the lumbar vertebra (B), for while it stands manifest that the " tuber- cle " (3) * of the latter is counterpart of the transverse process (3) of the dorsal vertebra, then it must follow that the thoracic rib and the lumbar " transverse process " f so called are also counterparts. The lumbar vertebra therefore produces the costal PROP. VII I. AIL the lumbar vertebra? develop costal appendages. — That which is true of the first lumbar vertebra and the last costo- vertebral thoracic form must be true of the five lumbar vertebra? and the twelve thoracic costo- vertebral forms, for all the lumbar vertebrae are fashioned of an equ^l number of elementary pieces. The difference which exists between lumbar vertebrae and thoracic costo-vertebral forms is one of quantity, and the costal ap- pendages of both are those which show this quantitative difference. — The ribs of the thorax are proportionably larger than those of the loins. In the thorax the costae (4 of A, ) appear articularly connected with t
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