THE CLASSIFICATION OF CRUSTACEA 65 



insect of Southern Europe led to a common 

 Mediterranean species receiving long ago the name 

 Squilla mantis (Plate XII.). 



The Stomatopoda have a small carapace, which 

 does not cover the last four thoracic somites, and 

 has in front a small flattened rostrum, attached 

 by a movable hinge, like that of the Leptostraca. 

 The eyes are stalked, and, like the antennules, are 

 attached to a separate movable segment of the front 

 part of the head a peculiarity not found in any 

 other Crustacea. There are small plate-like gills 

 attached to the bases of some of the thoracic limbs, 

 but the chief organs of respiration are large feathery 

 gills attached to the pleopods or swimmerets. 



The Stomatopoda are all found in the sea, gener- 

 ally in shallow water, burrowing in sand or hiding in 

 crevices of rocks or corals. Some species are more 

 than a foot in length. 



