182 DR. J. E. GRAY ON THE TORTOISES. [ Mar. 11, 
b. The sterno-costal suture and the abdominal shields not so long as 
the front lobe of the sternum; hinder lobe rounded behind. 
Thorax not keeled. Vertebral plate longer than broad. 
2. SwWANKA MACULATA. 
The sides of the head, neck, and throat grey, with a few indistinct 
dark-edged subcylindrical spots, largest on the front of the chin ; 
fore legs with three cartilaginous ridges. Thorax dark olive. Ster- 
num-ridges and lower side of margin yellow, with dark spots on 
areoles of shields. The fore and hinder ends of sternum regularly 
rounded. Vertebral shields longer than broad. 
Hab. Mexico (Sallé); Vera Paz (Salvin). 
A specimen in spirit, collected by M. Sallé in Mexico. The 
sternum and underside of the margin pale yellow ; the areola of the 
third and fourth pairs of sternal plates, which are situated on the 
outer side of the anterior transverse suture, is surrounded by an ir- 
regular-shaped brown ring. A more or less obscure indication of 
such a ring is to be seen surrounding the areola of the other sternal 
plates. The areola is on the outer hinder side of all the sternal 
shields, except of the fourth or abdominal pair, where it is on the 
front outer angle. 
Two large specimens in spirit, from the Lower Forest of Vera 
Paz, received from Mr. O. Salvin. They are like those from 
Mexico, but darker below. The head is large, very hard, and the 
beak and temporal muscles very strong. ‘The two beards are in 
front of the chin, quite near the hinder edge of the lower beak. The 
zygomatic arch is wide, strong, and rather convex. Toes very strong, 
short, with a few bands above near the ends, with narrow webs to 
the claws. The fore legs with the skin smooth, and three oblique, 
arched, sharp-edged horny cross ridges just above the feet, the 
lower one the shortest. 
In the band over the orbit this species agrees with Kinosternon 
hippocrepis, figured from a young specimen, Gray, Cat. Shield Rept. 
t. 20c. f. 3,4; but the sternum is much broader than in that spe- 
cies, and more completely closes the cavity of the thorax. Thorax 
about 4 inches long. 
A large well-grown specimen in spirit in the British Museum, 
received from M. Brandt of Hamburg as from North America. The 
skull is pale olive, speckled with darker brown ; thorax pale bright 
brown, the underside of the margin of the thorax being uniform 
blackish brown. 
Four specimens in spirit, obtained by M. Sallé at Papaleo Apoia ; 
but it is not stated that they were from the same district. If they 
were, it will go to prove that the height of the front lobe, as com- 
pared with the length of the abdominal shield, is probably a character 
of age and not of specific distinction. They each have a speckled 
or mottled neck, and are without any head-streak. The two larger 
specimens vary in other particulars, but probably from local circum- 
stances, as one has a good smooth shield, and of the other the shield 
is rugose and covered with mud and alge, and the whole specimen 
