TRACHEATA 405 
Appendages of Pedipalpi. 
1. Chelicerae. 4, 2nd pair of legs. 
2. Pedipalpi. by eitel xr 
3. Ist pair of legs, antenniform. 6. 4th ,, 3s 
The chelicerae are clawed, and probably contain poison 
glands; the pedipalpi are clawed in Phrynus, and chelate 
in Thelyphonus. The elongated anterior legs function as 
antennae, which they resemble in structure. The other legs 
are seven-jointed. A pair of closed coxal glands lying be- 
tween the second and fourth pairs of legs have recently been 
described. 
The genital orifice is ventral, at the anterior end of the 
abdomen, and the respiratory sacs open, one pair on the 
Fig. 232.—Thelyphonus, portion of under side. 
a. Moveable claw on pedipalp. 
b. Fixed claw on pedipalp, 
ce, Claw on third palpal joint. 
d, Coxal joint of pedipalp. 
e, f. Sternal plates, 
g. Orifice of sexual organs. 
h, Place of labium, 
o, Orifices of respiratory organs, 
posterior edge of both the second and the third abdominal 
segments. Phrynus, like the scorpions, produces its young 
alive. There are eight eyes: two large ones near the centre 
of the cephalothorax, and six small ones round its 
margin. 
Thelyphonus seems to be nocturnal in its habits, and passes 
the day under pieces of bark, ete. When irritated, it is said 
to carry its tail erect like the scorpions, and the chief interest 
of the group lies in their forming an intermediate link 
between the Scorpionida and the Araneida. 
