402. 



ZOOLOGY 



Appendages of Chdifer. 



1. Chelicerae. 



2. Pedipalpi, very large. 



3. 1st walking-legs. 



4. 2nd walking-legs. 



5. 3rd „ „ 



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 



Fig. 229. — Chelifer sesamoides, 

 Savigny. 



u. Thorax (prosoma). 



b. Abdomen. 



c. Chelicerae. 



d. Eyes. 



e. Hinder segment of thorax. 

 /. 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 Tectum 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, Ghthonius, and Chernes, all have a wide distribution. 

 Chelifer caTwroides is kiiown 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- 



