418 FOSSIL REMAINS FROM JUBBULFOOR. 



Memorandum op two remarkable Vertebra, sent by 

 Dr. Oldham prom Jubbulpoor — Spilsburt's Bed. 



29tk August, 1862. 



The larger vertebra consists of a compressed body, very 

 considerably compressed sidewise, and contracted in diameter 

 between the articular surfaces, both in the vertical and 

 transverse direction. The anterior articulation is elliptical 

 vertically in its outline, and the cup as deep as in the Gro- 

 codilia ; the posterior articulating surface is of a correspond- 

 ing reversed form, i.e. very convex, flattened laterally, the 

 greatest convexity being towards the middle or axis. The 

 inferior surface of the body at either end bears, immediately 

 behind the rim of the cup m front, and in front of the ball 

 behind, a. pair of surfaces for the articulation of a chevron bone, 

 i.e. each chevron has been articulated to two adjoining 

 vertebrte. 



The spinous process, which is broken off, is flattened and 

 of considerable size towards the base ; it is given off from 

 the body backwards at an angle of about 45°. Between it 

 and the body there is a semicircular niche about 1*2 inch 

 deep. From the anterior part or base of the spinous pro- 

 cess two artictilar apophyses are given off nearly horizontally, 

 or inclined upwards at a small angle, and diverge, but the 

 divergence is small. The articular surfaces are on the axial 

 side (inside). 



It would appear that the next anterior vertebra passed 



its spinous process between these articular surfaces ; but no 



marks of such articulation are seen in the spinous process of 



the vertebra. 



Dimensions. 



Inches 



Extreme length of body 5'4 



Height in middle to hollow between spinous and articulating 



apophysis .......... 4-9 



Height of anterior concaye end ....... 3'4 



Width of do 2-4 



Length of body from rim to base of ball 4'1 



Height at base of ball behind ....... 3"4 



Transverse diameter of do . . . 2-3 



Height of body where constricted behind . . . . . 2'8 



Greatest constriction of do. . . . . . . . . 1'3 



Length of articular process ........ 2'2 



Do. from base of spinous process to tip of do. . . . . 4- 



Length of lamina, right side . . . . . . . , I'S 



Vertical diameter of spinous process 1'9 



Transverse diameter of do . . . O'S 



Vertebral canal small and constricted; not a trace of a 

 suture remaining (See Plate XXXIV. figs. 3, 4, and 5). 



The other vertebra, Wo. 2, is shorter and less perfect. The 

 spinous process is broken off at its base, and the articular 



