402 ZOOLOGY: 
Appendages of Chelifer. 
1. Chelicerae. 4, 2nd walking-legs. 
2. Pedipalpi, very large. 5. 38rd + 3 
3. Ist walking-legs. 6. 4th * - 
Coxal glands are present in the form of closed tubes, 
which may be bent once; these lie in the region of the last 
Fic. 229.—Chelifer sesamoides, 
Savigny. 
a. Thorax (prosoma), 
b, Abdomen. 
c. Chelicerae. 
d. EKyes. 
e. Hinder segment of thorax. 
J. Front segment of thorax. 
h. Pedipalpi. 
three pairs of legs, and at present no opening to the exterior 
has been described. 
The ventral ganglia have fused into a circular mass, from 
which nerves radiate to the various organs. 
The intestine is folded in a single loop, a very rare thing 
in Arachnids. The rectum has a diverticulum in which, as 
is the case with spiders, the excrement accumulates. 
The genital opening is between the second and third 
abdominal sterna. The females carry the eggs about attached 
to the abdomen, and the young live for some time in a small 
web formed from the secretion of the spinning glands. 
There are several genera of Pseudoscorpions: Chelifer, 
Obisium, Chthonius, and Chernes, all have a wide distribution. 
Chelifer cancroides is known as the book-scorpion, as it is 
found among old books and papers. Other species live under 
bark, or in moss in damp places; they feed mostly on mites 
and small insects. They can run rapidly, sideways or back- 
