DR. A. GUNTHER ON GIGANTIC LAND-TORTOISES. 
279 
Measurements of cervical vertebrae : — 
2nd. 
3rd. 
4th. 
5th. 
6th. 
7th. 
millims. 
millims. 
millims. 
millims. 
millims. 
millims 
Length of centrum 
. 47 
65 
88 
80 
82 
72 
Depth of middle of centrum . 
. 34 
26 
25 
26 
25 
49 
Horizontal width of middle of centrum 14 
18 
17 
20 
25 
27 
Width of anterior condyle . . . 
. 15 
18 
20 
Width of anterior articular cavity . 
36 
42 
41 
Width of posterior condyle . . . 
25 
28 
39 
Width of posterior articular cavity . 
. 19 
23 
50 
Distance of outer margins of anterior 
zygapophyses J 
j- 20 
33 
38 
37 
42 
33 
Distance of outer margins of posteriory 
zygapophyses J 
l 28 
31 
31 
35 
28 
55 
Dorsal vertebrae. — The last of the three vertebrae which emit pleurapophyses to form 
the protuberance for the articulation of the ilium is the eleventh, so that only eleven 
vertebrae can be assigned to this part of the vertebral column. Of the two heads into 
which the first rib bifurcates the posterior is more slender than the anterior ; the 
triangular space enclosed by them is wide, but less so than in T. elephant opus. For 
comparison with the latter species I give the length of the centra of the several dorsal 
vertebrae : — 
Dorsal vertebrae 
1st. 
2nd. 
3rd. 
4th. 
5th. 
6th. 
7th. 
8th. 
9th. 
10th. 
llth. 
12th. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
Test, elephantopus 
. 65 
80 
80 
80 
78 
55 
48 
48 
16 
14 
16 
22 
Test, vicina . . 
. 56 
80 
87 
87 
79 
61 
43 
32 
17 
15 
18 
(21) 
Caudal vertebrae twenty in number, but it is possible that the last rudimentary ossicle 
has been lost. 
Limb-bones. — Singularly enough the resemblance which we notice between the skulls 
of this species and T. ephippiurn does not uniformly extend to the other parts of the 
skeleton, the limb-bones of T. vicina being much shorter and stouter than in that 
species, approaching more T. elephantopus. The scapulary (Plate 45. figs. C, C') espe- 
cially is stout and massive. The angle at which the scapula and acromium meet is 
much less obtuse than in T. elephantopus (about 100°) ; the body of the scapula is com- 
pressed, elliptical, with both its anterior and posterior sides equally convex ; a trans- 
verse section through its middle would be represented by the figure of a greatly elon- 
gate O. The shaft of the acromium is trihedral, with the edges rounded, and with 
the extremity compressed and slightly dilated. The coracoid is not anchylosed to the 
scapula, and its proximal part (neck) is singularly dilated, and very much broader than 
the corresponding part in T. elephantopus. In fact the differences in the scapularies of 
2 p 2 
