127 



616. A longitudinal section of a rib of the great Python, showing its mcdullan 

 cavity, the density of its parietes, and the canccllous structure of the articular 

 proximal end Pretexted by Prof. Owen, F.R.S. 



617. A longitudinal section of another rib of the same Python, taken in the oppo- 



site direction. Pref*trd by Prof. Owen, F.R.S 



CIS. Two posterior abdominal vertebra: of a Python, characterized by the inferior 

 ridge of the centrum and its bifid terminal tubercle. P*rckaed 



* 



619. An anterior caudal vertebra of a Python, in which the plcurapophysis or ver- 



tebral rib is bifurcate and anchylosed to the centrum. Purckaaed. 



620. Two of the bifurcate ribs of the anterior caudal vertebra of a Python, which 



have retained their moveable articulation with their respective diapophym. 



Purcknxrd. 



A more posterior caudal vertebra of a Python, in which the pleurapophyscs an- 

 anchyloscd, short and straight, and the bifurcation is limited to their cxtre- 

 mities. Parchawd. 



622. A more posterior caudal vertebra of a Python, in which the anchyloscd plcur- 

 apophyses are simple and extend outwards and backwards, like long trans- 

 verse processes. /'///-<//.,/ 



623. Two middle caudal vertebra 1 of the Python, in which the simple plcura|x>- 



physes are confluent with the extremities of the diapophyses, and form with 

 them long deflected transverse processes. Two diverging hypapophyse* are 

 developed from the under part of the centrum. Purchased. 



624. Two caudal vertebra- from nearer the extremity of the tail, where the trans- 



verse proMMM are shorter, and the two hypapophyses are parallel or conver- 

 gent at their extremities. Purcktued. 



625. The skeleton of a small specimen of Python {Python tiyrit). 67 vertebra- 



have hypapophyscs descending from the anterior part of the body ; 101 bear 



