PODOPLEA — AMPHARTHRANDRIA 



6l 



Sub-Order 2. Podoplea. 



The l)Ouiidaiy between the fore and hind part of the body falls 

 in front of the fifth thoracic segment. The appendages of the 

 tifth tlioracic pair in the male are never modified as copulatory 

 organs. 



TRIBK I. AMPHARTHRANDRIA. 



The first antennae in the male differ greatly from those in 

 the female, being often geniculated and acting as prehensile organs. 



Fig. 28. — Euterpe acutifrons, 9, 

 X 70. Ahd.l, 1st abdominal 

 segment ; Th.5, 5tli thoracic 

 segment. (After Giesbrecht.) 



Fig. 29. — First antenna of 



Evterpe acutifrons, S . 

 (After Giesbreclit.) 



Fams. 1-2. Cyclopidae and Harpacticidae, and other 

 allied families, are purely free-living forms ; they are not visually 

 pelagic in habit, Init prefer creeping among algae in the littoral 

 zone or on the sea-bottom, or especially in tidal pools. Some 

 genera are, nevertheless, pelagic ; e.g. Oithona among Cyclopidae ; 

 Setella, Clytemnestra, and Aegistlius among Harpacticidae. 



The sketch (Fig. 28) of Buteiye acutifrons <^ , a species widely 



