THE 
UKA CRAB. 
Generic Character. 
Legs generally eight; (in some , species six or 
ten, besides two claspers or chelated arms.) 
Eyes two, commonly distant ; footstalkcd, 
moveable. 
Tail articulated. 
Specific Character , &c. 
Squarish yellow CRAB with the claw on the 
right side extremely large. 
UKA CRAB. 
UKA UNA. Seba. 3. t. 18. f. 8. 
This species is taken from the work of Seba, who 
informs us that it is called by the Brasilians by the 
name of Uka una, from its frequenting marshes and 
rivulets. Its general colour is deep yellow on the 
upper parts, and pale greyish yellow beneath: it is 
chiefly remarkable for the very large size of its right 
claw which is calculated for seizing its prey, while 
the left, which is small and slender, is formed for 
conveying the food to its mouth : the eyes are small, 
and situated on long, moveable footstalks, and are 
capable of being occasionally retracted under the 
shell, the tail is very small and slender. 
