1448 CRUSTACEA. 



Fam. III. PENELLID^E. Pedes obsoleti. Caput 2-4 appendicibue 

 brevibus non articulatis munitum. 



1. PENELLIN.S;. Pedes pauci rudimentarii vix obsoleti. G. Penella, Oken, Ler- 

 neonema, Edw. 



2. LEKNEOCERIN;E. Pedes oinnino obsoleti. Or. Lerneocera, Bl., Lernea. 



SUBORDO II. ARACHNOPODA VEL PYCNOGONOIDEA. 

 Fam. I. NYMPHIDvE. Antennis munitaj. 



G. Nymphum, Fabr., Aminothea, Lh., Pallene, J., Phoxichilidium, J. 



Fam. II. PYCNOGONID^E. Antennis carentes. 



G. Pycnogonum, Brunnich, Phoxichilus, Lat. 



SUBCLASSIS IV. CIERIPEDIA. 



SUBCLASSIS V. ROTATORIA. 



APPENDIX. 



THE following references are here added to genera of Fossil Crus- 

 tacea, not mentioned in the preceding classification, excluding the 

 Trilobite group. 



1. XANTHID^;. Arges of De Haan (Faun. Japon., 21 and 52, pi. 5, 



