LARGE -EYED CRUSTACEA OF THE DEPTHS. 



Fig. 50. — The Squeaker Crab {Psopheticus stridulans), from the Andaman 

 Sea, 173-419 fathoms. A dismal sound, like the squeaking of a pencil on a slate, 

 can be made by rubbing the spine on the "arm" of this crab against a roughened 

 knob on the adjacent orbit ; reduced. 



Fig. 51. — Munida andamanica, from 173-419 fathoms, the common Andaman 

 Coral-lobster. The position is conventional. 



\To face page 260. 



