SYNOPSIS 



GENERA OF NORTH AMERICAN CRUSTACEA HITHERTO OBSERVED. 



I. DECAPODA. 



Libinia, Leptopodia, Hyas, Mithrax, Xantho, Panopeus, Platycarcinus, Pilumnus, Carcinus, Platy- 

 onichus, Lupa, Pinnotheres, Ocypoda, Gelasimus, Sesarma, Nautilograpsus, Plagusia, Iliaj 

 Hepatus, Lilhodes, Hippa, Pagurus, Porcellana, Monolcpis, Callianassa. Astacus, Homarus, 

 Crangon, Alpheus, Hippolyte, Pandalus, Palemon, Peneus, Mulcion. 



II. STOMAPODA. 

 Mysis, Diastylis, Squilla, Gonodactylus. 



III. AMPHIPODA. 



Orchestia, Talitrus, Gammarus, Amphithoe, Cerapus, Lepidactylis, Unciola, Hyperia. Podocerus. 



IV. LCEMIPODA. 

 Cyamus, Caprella. 



V. ISOPODA. 



Idotea, Stenosoma, Anthura, Sphteroma, Nnssa, Cymothoa, Limnoria, Asellus, Ligia, Philoscia, 

 Oniscus, Porcellio, Armadillo, Fluvic.ola. 



VI. PCECILOPODA. 



Polyphemus, Argulus, Caligus, Anthosoma, Pandarus, Cccrops, Lernea, Penella. 



VII. PHYLLOPODA. 



Apus. 



VIII. LOPHYROPA. 



Cyclops, Scopiphora. 



IX. BRANCHIOPODA. 

 Branchipus. 



X. OSTRAPODA. 

 Cypris, Gyfherina, Daphnia, , 



