1434 



CRUSTACEA. 



1. Alpheinje. — Pedes lmi crassiores, cbelati; 2di filiformes, carpo saepius annu- 

 lato, plerumque cbelato. Mandibulae palpigerae.: — Gr. Alpheus, Fab., £etaeus, D., 

 Mope, W., Athanas, Lh., Hippolyte, Lb., Ehyncocinetes, E. 



2. Pandalinje. — Pedes lmi gracillinii, non cbelati, 2di filiformes, carpo annulato. 

 — Gr. Pandalus, Lb. 



3. Pal^emoninje. — Pedes 4 antici cbelati, 2di lmis crassiores, carpis nullis annu- 

 latis. Pedes nulli palpigeri. — Gr. Pontonia, Lat., D., (Edipus, D., Earpilius, 

 D.j Anchistia, D. (An Periclimeni Costse similis ?) Palaemonella, D., Paleemon, 

 Fab., HymenocercLy Lat., CrypMops, D. [Hie Typton Costae, si non squama an- 

 teimarum basalis nulla.] 



4. Oplophorinjg. — Pedes lmi sive didactyli sive monodactyli ; 2di cbelati, cras- 

 siores. Squama antennarum externarum acuminata, extus spinis armata. — G-. 

 Oplopkorus, E., Regulus, D. *r <&fcaJ—*~L r t 



[Cujus sedis Autonomea, Risso ?] 



2. Maxillipedes 2di tenuiter pediformes. 



Fam. IV. PASIPH^EID^E.-— Mandibulse uti in Atyidis. 



Gr. Pasiphaea, Sav. 



Subtribtjs III. PENJEIDEA, vel Macroura Inferiora. 



Carapax sutura nulla notatus, cum epistomate antice non connatus. 

 Antennoe externse squama basali magna instructs. Pedes lmi 

 2dique 3tiis non crassiores, 3tii ssepius crassiores longiores et che- 

 lati ; raro pedes toti debiles et tenues, 3tiis sive obsolete chelatis 

 sive non chelatis. 



Fam. I. PEN MIDM.— Pedes 6 antici chelati, 3tii longiores et plus 

 minusve validiores. 



Gr. Sicyonia, E., Penxus, Lat., Aristeus, Duv., Stenopus, Lat., Spongicola, De H. 



Fam. II. SERGESTIDJE.— Pedes totylebiles, 2di 3tiique consimiles, 

 sive obsolete didactyli sive non didactyli. Maxillipedes externi 

 tenues. 

 Gr. Sergestes, E., Acetes, E., Euphema, E. (An hujus sedis ?) 



Fam. III. EUCOPIDiE.— Pedes toti debiles, 2di 3tiique non chelati, 

 lmi maxillipedesque externi monodactyli et subprehensiles. 

 Gr. Eucopia, D. 



