DE. A. GGNTHEE ON GIGANTIC LAND-TOETOISES. 
267 
derable, and scarcely less than the horizontal ; and, secondly, that, although all other 
sutures in this aged specimen have disappeared, the transverse , suture between the pubic 
and ischiadic halves of the bridge is still persistent. The iliac bones are comparatively 
slender, the longitudinal diameter of the pelvis much exceeding the horizontal one. 
The lower part {b) of the pubic bones is gently inclined downwards and slightly concave 
above ; it emits laterally a very long, strong, nearly styliform process (c), which is 
obliquely directed outwards. The posterior part (d) of the ossa ischii is of considerable 
width, very slightly concave above, and provided with a trenchant symphyseal crest 
below, which, expanding towards behind, forms a large triangular tuberosity. Lateral 
margin of the ossa ischii excised in the shape of a C. Obturator foramina of moderate 
width, considerably wider than the bridge between them, which is not provided above 
with a median longitudinal crest. 
millims. 
Longest inner vertical diameter of pelvis (from summit of ilium to 
symphysis) 170 
Longest inner horizontal diameter of pelvis 132 
Shortest inner horizontal diameter of pelvis (between ilio-pubic pro- 
minences) 112 
Longest diameter of foramen obturatorium 42 
Width of symphyseal bridge 26 
Depth of symphyseal bridge 26 
Least breadth of posterior portion of ossa ischii 61 
Length of os ilii 140 
Least breadth of os ilii 30 
The shaft of the femur (Plate 44. figs. A, A', A") is rather stout, nearly straight, irre- 
gularly subtetrahedral, narrower in front than behind. The head has an elliptical form, 
and does not rise above the level of the summit of the larger trochanter, from which it 
is separated by a deep and broad cavity. The larger (a) and lesser ( b ) trochanters are 
confluent into one broad ridge, and not separated from each other by a smooth groove, 
as we shall find to be the case in some of the following species. The length of the 
femur in this example is 169 millims., with a least circumference of 80 millims. ; the 
width of the condyles is 66 millims. 
Of the lower leg no part deserves to be mentioned particularly. The tibia is 136 
millims. long, and the fibula 123 millims. 
Also the bones of the foot may be passed over, with the exception of one point, viz. 
that, like some bones of the carpus, the astragalus and calcaneum are entirely coalesced, 
so that no trace of their former separation remains. 
2. Testudo nigrita. 
No doubt can possibly be entertained as regards the correct application of this name 
to the species which I am about to describe. It had been given by Dumeril and 
