3. PODOCNEMIS. 205 
bridge less than the width of the hind lobe; intergular shield 
much longer than gulars; the longest median suture is formed by 
the abdominals, the shortest by the humerals; young with three 
tubercular swellings on each side of the plastron, traces of which 
may be found in adult specimens. Interorbital space concave, much 
narrower than the diameter of the orbit ; upper Jaw not hooked; a 
large interparietal shield, entirely separating the parietals; the 
width of the mandible at the symphysis nearly equals the diameter 
of the orbit ; alveolar surface of upper jaw with a short and feeble 
ridge ; inner edge of mandible much raised, the mandible subtri- 
angular in section. Chin with a single dermal appendage. Two 
very large shields on the outer border of the foot. Shell brown or 
olive above, yellowish, blotched with brown, inferiorly ; head reddish 
brown above. 
Length of shell 31 centim. 
Amazon. 
a, Ad., spir. Upper Amazon. Mr. E. Bartlett [C.].) (Types of 
b. Ad., stffd. Upper Amazon. Mr. EK. Bartlett [C.|. > Bartlettia 
e. Ad., skel. Upper Amazon. Mr. E. Bartlett [C. |.) prteprz.) 
d, Ad., shell. Upper Amazon. H. W. Bates, Esq. [C. ]. 
6. Podocnemis madagascariensis. 
Dumerilia madagascariensis, Grandid. Rev. et Mag. de Zool. (2) xix. 
p- 232 (1867); Gray, Suppl. Cat. Sh. Rept. 1. p. 82 (1870), and 
Amn. § Mag. N. H. (4) xi. p. 149 (1873). 
Shell oval, moderately depressed, keeled in the young ; posterior 
border more or less strongly reverted ; dorsal shields with more or 
less distinct radiating strie. Plastron large, front lobe broader than 
hind lobe; the width ef the bridge equals the width of the hind 
lobe ; intergular shield very small, much shorter than the gulars, 
which form a suture behind. Interorbital space flat, nearly as 
broad as the diameter of the orbit in the adult, half as broad in the 
young ; upper jaw slightly hooked; jugal bone forming a suture 
with the quadrate; a large interparietal shield, behind which the 
parietals form a suture ; the width of the mandible at the symphysis 
much exceeds the diameter of the orbit; alveolar surface of both 
jaws with a feeble median ridge. Chin with a short dermal appen- 
dage. Three very large shields on the outer border of the foot. 
Brown above, finely dotted or striated with black ; plastron yellow, 
uniform or soiled with brown. 
Length of shell 35 centim. 
Madagascar. 
a, Ad., skel. Anuavandra, W. Mada- 
eascar, 
b. 9, stffd. S.E. Betsileo. Mr, T. Waters [C. }. 
c, d,e, f. Hgr.& yg., S.E. Betsileo. Mr. T. Waters [C. ]. 
skins. 
g. 3, skel. S.E. Betsileo. Mr. T. Waters [C. ] 
