1869. | DR. J. E. GRAY ON THE TORTOISES. 181 
thorax. The sternum is black, with symmetrical variously shaped 
white spots, most abundant near the outer edge; the underside of 
the margin of the thorax is yellow, varied with dark edges to the 
shields. The animal is pale brown and more or less yellow-spotted. 
There is a series of triangular yellow spots on the lower edge of the 
lower beak. 
AROMOCHELYS ODORATA. 
An adult specimen, in spirits, in the British Museum, from North 
America, presented by Odo Russell, Esq. 
Head large ; nose produced, conical, acute, shelving to the mouth 
below; nostrils surrounded by a very small fleshy margin. Head 
dark olive, punctulated, with a narrow white streak from the upper 
and the lower edge of the nose, the upper streak edging the crown 
over the orbit to the nape; the lower diverging under the eye and 
tympanum and crossing the beak. The lower beak with a streak 
on each side of the centre in front, diverging to the chin on the lower 
edge of the horny sheath. Neck with streak of roundish confluent 
spots. 
SwaNKA. 
The sternal lobes as broad, or nearly as broad, as the opening of 
the thorax, rounded in front, and rounded or very slightly truncated 
behind. 
a. The sterno-costal suture and the abdominal shields as long as the 
front sternal lobe ; hinder lobe rounded at the ends. Thorax 
three-keeled. Vertebral plate elongate. 
1. SwaNnKa SCORPOIDES. 
Kinosternon scorpoides, Gray, Cat. Shield Reptiles, p. 44. 
Cinosternon scorpoides, Wagler, N. Syst. Amphib. t. 5. f. xxxi.- 
xxxvii. (skull); Owen, Cat. Osteol. Mus. C. S. p. 191. n. 992 
(skeleton). 
Skeleton in the College of Surgeons, No. 992. Skull thin, light ; 
nose rather produced ; crown rhombic, flat; sides of face flat; orbit 
moderate, lateral; zygomatic arch very broad, strong, nearly flat. 
Palate flat. The alveolar edge smooth, rather wider behind. In- 
ternal nostrils close, anterior between the fronts of the alveolar plates. 
Lower jaw rather strong, broad, and convex, in front more slender 
than the sides ; the upper edge broad, rather concave, with an acute 
central process. 
The two small specimens from M. Sallé both with rather rough 
and worn dorsal shields. One of them is keeled the whole length of 
the back, and the other only keeled over the hinder part of the back. 
They both have the front lobe of the sternum very nearly of the 
same ‘length as the rather long abdominal shield. I cannot take on 
myself to say if they are of two species or only varieties of the same 
without having more information respecting them and the develop- 
ment of the animals. 
Proc. Zoou. Soc.—1869, No. XIII. 
