THE GIG-ANTIC LAND-TOETOISES OF MAUEITIUS. 
47 
Fis. 2. 
considerably in size (the scapula proper of the largest individual being G^" long, and 
that of the smallest 4|^") it is remarkable that all have the coracoid firmly ankylosed 
to the scapula, the suture having entirely disappeared. 
This form of scapula, which may be referred to Testudo triserrata, does not differ 
from two other scapularies in the British Museum, obtained together with a femur and 
fragments of pelvis, for which I have proposed the name of Testudo leptocnemis. 
h. In the second type, of which I have three specimens (Nos. 39937 and 39938 in 
the British Museum and one in Mr. Newton's collection) before me, the distal portion 
of the acromium is compressed and its end is curved ; the proximal half of the scapula 
is trihedral ; but the anterior and acromial sides have a deep longitudi- 
nal impression, so that a transverse section through this part of the 
scapula represents a figure like the following (fig. 2). Otherwise the bone 
is of the same build as in the first type ; but, although these specimens 
again differ considerably in size (the scapula proper of the larger being 
6-|" long, and that of the smaller 4^"), the coracoid never became an- 
kylosed to the scapula, and is lost. This is a most singular distinction 
from T. triserrata. The species to which this type of scapula belongs 
is possibly Testudo inepta. 
c. The third modification, of which I have seen two examples (No. 3993G in the 
British Museum and one in Mr. Newton's collection), approaches closely to the pre- 
ceding in having the same compressed acromium, with the end slightly curved. The 
coracoid, likewise, was not ankylosed to the scapula ; but the scapula itself is pig, 
strongly compressed, in no part trihedral, and a transverse section would be 
of the following shape (fig. 3). This bone is the only one on which our 
knowledge of a supposed fourth species, Testudo houtonii., rests (' Nature,' 
1875, p. 297). But having found a perfectly analogous instance in the scapula 
of the Rodriguez Tortoise, I must regard this modification as a case of 
anomaly only. 
Measurements. 
T. triserrata. T. leptocnemis. 
T. inepta. T. houton 
N*. 
No. 39939. No.39940. 
(B. 6.) 
No. 39937. 
No. 39938. 
milliin. 
millim. 
millim. 
millim. 
millim. 
millim . 
millim 
Length of scapula (measured 
from the suture^ with 
coracoid) 
162 
140 
114 
150 
161 
114 
128 
Circumference in its middle 
72 
62 
50 
59 
65 
39 
53 
Longitudinal diameter of 
glenoid cavity 
43 
36 
32 
42 
Length of coracoid 
74 
61 
54) 
damaged 
^lost 
Greatest width of coracoid 
61 
59 
51 J 
J 
Length of acromium 
70 
54 
52 
62 
75 
Ob 
61 
* 
From Mr. Newton's Collection. 
