430 MR. ST. GEORGE MIVART ON THE 
Tue Friery-SECcOND VERTEBRA. 
This vertebra closely resembles its serial predecessor, but is smaller in size (fig. 66). 
THE FIFTY-SECOND, on SIXTH CAUDAL VERTEBRA (natural size). 
Fig. 66. 
Fig. 66, preaxial aspect. Letters as before. 
THE Firry-THIRD VERTEBRA. 
Here the transverse processes project more postaxiad and ventrad, and the diapo- 
physial part has greatly decreased relatively to the parapophysis. The spinous process 
shows a more or less marked tendency to become trifid transversely at its apex. 
Tue Firry-rourtH VERTEBRA. 
This vertebra (fig. 67) is much smaller than its predecessor. The transverse pro- 
cesses are very much smaller, but the apex of the neural spine is very distinctly trifid 
transversely. 
The preaxial surface of the centrum is decidedly concave, as in all the vertebre since 
the fiftieth. 
THE FIFTY-FOURTH, or THE FIFTY-FIFTH anv FIFTY-SIXTH, or 
EIGHTH CAUDAL VERTEBRA NINTH AND TENTH CAUDAL VERTEBRA 
(natural size). (natural size). 
Fig. 68. 
Fig. 67, preaxial aspect (letters as before); 68, preaxial aspect of ninth caudal vertebra; ms’, neural spine of 
tenth caudal vertebra; 69, lateral aspect; d, osseous bridge connecting the portions. 
Tue Firty-rirtH VERTEBRA. 
This vertebra is devoid of transverse processes; or there are at most but minute faint 
