THE RELATIONSHIPS OF THE SEA-SPIDERS. 



143 



At the anterior end of the body we see the large for- 

 wardly-projecting proboscis, with the triangular mouth 

 opening at the anterior end. Above and on each side 

 of the proboscis lies the first pair of appendages — the 



mandibles so-called — each with a pair of forceps at 

 its end — the chelae. Behind the mandibles and some- 

 what on the dorsal side of the animal lies the second 

 pair of appendages — the palps. The next pair of 



