222 DR. J. MURIE ON THE ANATOMY [Feb. 14, 
Series of Measurements to illustrate the comparative Dimensions of 
the Caudal Vertebre, in inches. 
a) ° | Oe Ins ee fe ie s 
gis |ebs|/* lz |2 | Slae/2 |# [28/38 
So> eve] a ED FSI |) Spy |= s me |S 2 
SE 2 wy |S a ba! =~ e[4./So|/39)} ea cS) Pade) ie 
SESS |Seae| 25/25/85) 28/88) 85/os/ 28) 56 
Caudal vertebree.| 2 © 22/5 S58 |FS/SS/S8|/ So /5e/S8|S8|/esioe 
S553/S22s|28| Selenl selesl|sels2!l ss| ss 
Beee|S88S| 87 |ss| 8s) 82) ss|S°|S7| ee/ ss 
Se28/Sleegle (S°|e°\Aea\/ee|/2 1S | 88)] 88 
oes lSkanl& |o |e B/Ss/8 |z |oelds 
oR. (eo |S oO Siee oa noe 
dist stele yon 28 30 122}113|102| 7 | 63 |14 | 63 | 44 | 3h 
oS ee 26 272 1122/12 |102/6 | 62/12 |5 | 4 | 32 
Bi pckars 931 | 222 113 1122/102/5 | 521] 7 | 32 | 32 | 32 
Gi ena 18 90: [13 |112/103}4 17 | 6 | 22) 4 | 4 
Oth hee. 15 19 -/13 }113/10 | 2}|6 | 33/2 | 32 | 33 
Igh:sagcewe 123 | 153 |113/103| 9 | 14/5 | 3} 1 | 23] QB 
13th Svea 10 14 110) LORS abe dof oof OIE EL) Bee 
The bodies of the remaining caudal vertebre are as follows :— 
Greatest | Greatest 
width, height. 
Gin noes ee a Ss ok 74 33 
PT) OSS 74 33 
Leer putida ees 6 3} 
LO ileliach ackie tb naar dt 5 3 
5 a A eR 4 2 
FA She yee See iee AM ae 2 
The number of the chevron bones is fourteen; but from the cor- 
responding vertebral facets one would believe them to have been ori- 
ginally fifteen. The first and second have moderate-sized laminze ; 
a sharp-edged keel, long and tapering in front, shorter and more 
rounded behind ; both processes more produced in the first bone. 
The third, fourth, fifth, and sixth are considerably larger, each some- 
what oblong in shape, their depth being greatest ; the antero-poste- 
rior projections not prominent. In the seventh the laminze are very 
much stronger and thicker, the articulating facets of great breadth, 
considering the size of the bone. In the eighth, ninth, and tenth 
there is a slight return to the shape of the first and second. The 
laminze, however, are broader in comparison with these last : the keel 
is roughened at the junction with the lamine ; at the same time it 
is thinner, deeper, and shaped not unlike the sternum of a bird, 
sharp pointed in front; it is not so long and tapering as in the two 
first ; the posterior projection likewise is concave instead of convex. 
The laminz of the eleventh and twelfth are much shorter in depth ; 
the keel processes not prominent, although the bones are longest in 
this diameter. On the whole, they are solidified, and of an opposite 
oblong form to the third, fourth, fifth, and sixth. The thirteenth 
and fourteenth bones diminish much in size, but they are thicker in 
proportion ; they approach the triangular in figure ; the front articu- 
lations are very long and sloping, and these occupy the greater part 
