ii8 STALK-EYED CRUSTACEA 



teeth, not counting the external orbital angle, are 

 rounded ; last two more or less sharp. — [Cliloi'odiits.) 



12. The lobes are more or less pointed. — {Leptodius.) 



13. The lobes are more or less tooth-shaped, the 

 space between being wide. — {Phjmodcits) 



B. Endostome with distinct longitudinal ridges. 

 c. Antennse not excluded from the orbit. 

 f^. Carapace transverse, smooth. 



14. The front is formed of two lobes. — {Eiirythcvi.) 



15. The front is formed of four teeth. Fingers not 

 spoon -shaped. — ( 0::;ins. ) 



\ 



EitrytiiiDi. 



Oziits. 



^-J^ 



16. The front is notched in the centre, and each 

 side is cut into small lobes. Plngers not spoon-shaped. 

 — {Menippe.) 



g^. Carapace is transverse, hairy or covered with 

 down. 



17. The front is formed of two lobes ; exterior to each is 

 a lobe or tooth. Fingers acute or subacute. — {Piiuninns) 



18. The front is formed of two lobes ; exterior to each 

 is a notch. — {LobopiInin>nis.) 



ron^^^' 





Pi I II I. 



Lobopilitiiuuis. 





f^^ 



Hctcraitea. 



19. The front terminates in a thick and straight edge. 

 A horn-like crest on fifth joint of walking legs. — {Heter- 

 actea.) 



