840 PROF. ST. GEORGE MIVART ON THE 
The FIFTEENTH VERTEBRA (Plate LVI. figs. 25-28) is like of Pelecanus ; but there is no 
hypapophysis, only a slight median ridge, which also occurs in the fourteenth vertebra. 
The preaxial surface of centrum does not look so much ventrad; and there is no di- 
stinct articular surface at the ventral part of the outer surface of the pleurapophysial 
lamella. On each side there is a small foramen in the antero-posterior middle of the 
body, leading into the centrum from just above the ventral margin of the body. 
CERVICO-DORSAL VERTEBR. 
The SIXTEENTH VERTEBRA has the general character of the corresponding one of 
Pelecanus; but the hypapophysis is still rudimentary. There is no pleurapophysial 
lamella; but a sharp pointed process projects ventrad from the ventral surface of the 
distal end of the transverse process, and may be connected with the parapophyses by a 
minute osseous spiculum forming a rudimentary pleurapophysial lamella, while imme- 
diately postaxial to this small ventrally extending process is a subtriangular concave 
articular surface. The lateral foramen entering the centrum is very conspicuous. 
The SEVENTEENTH VERTEBRA is generally like that of Pelecanus ; but the hypapophysis, 
though a little larger than hitherto, is still very small. The lateral foramen leading 
into the centrum is smaller than in the sixteenth vertebra, and but very little larger 
than in the fifteenth. 
The EIGHTEENTH VERTEBRA has a long rib ending freely, with an unciform process about 
as long as the length of that part of the rib which is distal to it. 
DorsaL VERTEBRE. 
The NINETEENTH, TWENTIETH, and TWENTY-First have the general characters of the 
corresponding ones of Pelecanus, except that they are the first three dorsal vertebra. 
The TWENTY-SECOND VERTEBRA is less completely over-shadowed by the pelvis than 
in Pelecanus. It has a rib which is attached very slightly to the parapophysis, against 
which it abuts by its very slender proximal end. The parapophysis is almost on a level 
with the root of the diapophysis (Plate LX. fig. 5, xxi). 
The TWENTY-THIRD VERTEBRA is similar, and differs from that of Pelecanus in that it 
has a long and slender rib, 
It forms part of the ankylosed pelvic mass. The diapophysis and parapophysis are 
here united into a single “ transverse process,” and receive the slender proximal end of 
the fifth thoracic rib. 
The TWENTY-FOURTH VERTEBRA is similar, but smaller, more compressed, and with a 
smaller transverse process. 
THe Lumpar VERTBERA. 
The TWENTY-FIFTH, TWENTY-SIXTH, and TWENTY-SEVENTH VERTEBR& resemble the lumbar 
vertebre (the twenty-third, twenty-fourth, twenty-fifth, and twenty-sixth) of Pelecanus, 
except that generally these are only three in number. ‘There are but two presacral fora- 
mina on each side, enclosed between their distally expanding parapophyses. Sometimes, 
