On Motion in the lumbar division of the spine of birds, by George Oakley Fleming

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                                an oval form, the largest diameter of the oval being 
situated laterally, as in Plate 3, Fig: 1 & 2. In some cases, the lateral 
notch, and the enlargement of the hole is combined, to effect the same purpose. 
One or other of these contrivances may be observed 
in the dorsal or lumbar portion of all birds, although 
they obtain in a less degree, where the motion is more 
divided, than when there is only one or two vertebrae 
moveable; this may be observed in a very striking degree 
in the silver pheasant, the cavities of the two articulations 
formed by the single vertebra are very deep, and admit 
no doubt of the arrangement being made to facilitate lateral 
motion.

                            
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Manuscript details

Author
George Oakley Fleming
Reference
AP/28/6
Series
AP
Date
1846
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Cite as

On Motion in the lumbar division of the spine of birds, by George Oakley Fleming , 1846. From The Royal Society, AP/28/6

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