ii6 



STALK-EYED CRUSTACEA 



are seldom excluded from the interior hiatus of the 

 orbits. 



Synopsis of the Genera. 



A. Endostome without distinct longitu- 

 dinal ridges. 



a. Tips of fingers of first pair of legs 

 acute. 



a^. Carapace smooth. 



1. Antero-lateral margins smooth, entire, without crest ; 

 one blunt epibranchial lobe. — {Carpilius.) 



2. Antero-lateral margin defined by a crest which is 

 interrupted by fissures. — {Lophactaa.) 



^~\D 



Carpilius. 



Lophaclua. 



>/- 



Alt'd.ciis. 



b^. Carapace transverse, slightly convex ; regions well 

 marked, granular. 



3. Antero-lateral margins have three to five teeth. — 

 {MedcBus^ 



4. Antero-lateral margins have rounded lobes which 

 may not be well marked. — {Actcsa.) 



^-^ 



v.--Y^~-l 



Acttca. Xaiillio. 



d-. Carapace transverse, depressed. 





XantJiodes. 



