PODOPLEA AMPHARTHRANDRIA 



6l 



Sub-Order 2. Podoplea. 



The boundary between the fore and hind part of the body falls 

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

 fifth thoracic pair in the male are never modified as copulatory 

 organs. 



TEIBE I. AMPHARTHRANDRIA. 



The first antennae in the male differ greatly from those in 

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



Fio. 28. — Euterpe aautifrons, 9 , 

 X 70. Ahd.l, 1st abdominal 

 segment ; Th.5, 5th thoracic 

 segment, (After Giesbrecht. ) 



Fia. 29. — First antenna of 

 Euterpe acutifrons, S . 

 (After Giesbrecht.) 



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

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

 pelagic in habit, but 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 Aegisthus among Harpacticidae. 



The sketch (Fig. 28) of Euterpe acutifrons 9 , a species widely 



