196 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 18 



Key to Paraphoxus from Southern California 



1. Head with rostrum abruptly narrowed in front of eyes 2 



1. Head with rostrum tapering evenly in front of eyes 11 



2. Epistome with an anterior cusp 3 



2. Epistome unproduced 8 



3. Epistomal cusp long 4 



3. Epistomal cusp short , 6 



4. Teeth of peraeopod 5 very large, few in number variatus 



4. Teeth of peraeopod 5 small, numerous 5 



5. Rostrum very narrow, short, teeth of peraeopod 



5 slightly enlarged abronius 



5. Rostrum spatulate, long, teeth of peraeopod 5 small epistomus 



6. Gnathopod 1, article 6 narrow fatigans 



6. Gnathopod 1, article 6 broad 7 



7. Female eyes very small; uropod 3, inner ramus short daboius 



7. Female eyes large; uropod 3, inner ramus long lucubrans 



8. Peraeopod 5 with 2 large spurs bis cuspid at us 



8. Peraeopod 5 with medium sized or small teeth 9 



9. Head with very narrow, short rostrum stenodes 



9. Head with long, spatulate or broad rostrum 10 



10. Peraeopod 5 with 4-5 medium sized teeth heterocuspidatus 



10. Peraeopod 5 with many small teeth floridanus 



11. Epistome with an anterior cusp 12 



1 1. Epistome unproduced 13 



12. Epistomal cusp large, massive, long similis 



12. Epistomal cusp short, small cognatus 



13. Third pleonal epimeron with large tooth robustus 



13. Third pleonal epimeron lacks tooth 14 



14. Third pleonal epimeron with oblique lateral setal row. ...calcaratus 



14. Third pleonal epimeron lacks setal row 15 



15. Third pleonal epimeron asetose, slightly prolonged, 



maxillipedal palp bears apical spine oculatus 



15. Third pleonal epimeron setose on hind edge, 



maxillipedal palp lacks apical spine 16 



16. Female uropod 3 with short inner ramus, head short spinas us 



16. Female uropod 3 with long inner ramus, head long 17 



17. Peraeopod 3 stout, article 5 of peraeopod 



5 stout obtusidcns major 



17. Peraeopod 3 slender, article 5 of peraeopod 5 slender obtusidens 



