58 
Plastron equally broad in front and behind, its breadth being 
but little less than half its length measured along the median 
line from the origin of the suture between the gular plates to 
the end of that between the anals ; rounded in front and with 
a deep semi-ovate notch behind. Intragular plate moderate, 
octagonal, the hinder edges being distinctly though very 
obtusely angulated ; posterior angle very acute : gular plates 
quadrilateral, the sutural edge very short, about one- third of 
the hinder edge, which is one-half of the length of the plate : 
humerals with the outer and hinder edges produced backwards, 
and meeting at an acute angle ; hinder edge concave : pectorals 
large, pentagonal, the sutural edge about two-thirds of the 
length of the intragular plate, and rather less than the outer 
edge of the humeral plate : abdominal plates rectangular, 
one-fifth broader than long : femoral plates quadrilateral, the 
sutural edge half as long as the breadth, and but little less than 
the external edge, which is convex and laterally expanded, 
but not to so great an extent as the corresponding eighth and 
ninth marginal plates of the carapace j anal plates quadrilateral, 
the anterior edge straight and longer than the exterior, which 
with the posterior forms a very acute angle ; these plates are 
bent strongly upwards towards the carapace, the distance 
between their tips being much greater than that between a 
tip and the nearest point of the carapace. Colors — Carapace 
rich dark brown with a reddish tinge on the sides ; plastron, 
bridge, and lower surface of marginal plates pale yellow, the 
sutures with a light brown edging. 
Measurements. 
Inches. 
Length of carapace ... ... ... ... 10-00 
Greatest width at last margino-lateral plate... 7*25 
Depth below middle of second vertebral plate ... 3-80 
Length of nuchal plate... ... ... ... 0*75 
Width of same in front. .. ... ... ... 0-58 
Len 
gth of 
outer edg 
e of 1st mar 
ginal plate... 
1*15 
99 
9) 
2nd 
99 
1*35 
99 
99 
3rd 
99 
1-15 
99 
99 
4th 
99 • • * 
1-33 
99 
99 
5 th 
99 * * * 
1*05 
99 
99 
6th 
,, . . . 
0*95 
99 
7 th 
99 
1*10 
99 
99 
8 th 
99 • • • 
1-00 
99 
99 
9 th 
99 • * • 
105 
99 
99 
10th 
99 ••• 
1*10 
99 
99 
99 
99 
11th „ 
each caudal plate ... 
1*05 
1-10 
