WEST AMERICAN CRUSTACEA. 587 



the caudal stylets and in several differences in the rela- 

 tive proportion of the parts of the appendages. Judging 

 from the measurements of the species described by Pack- 

 ard, this is the largest of the North American species. 



Note. — After the first part of the present article had 

 been printed, I found that Ortmann had recently em- 

 ployed the name Pseudopiiinixa for a genus of Pinnother- 

 idce, which is the same name that I proposed for an allied 

 genus of the same family. I propose, therefore, to change 

 the name of my genus to Parapinnixa. 



EXPLANATION OF FIGURES. 



PlJATE XX. 



Fig. 1. Pinnotheres nudus, outline of caraijax. 



Fig. 2. Piuuotberes nudus, abdomen of female. 



Fig. 3. Pinnotheres nudus, 3d maxilliped. 



Fig. 4. Pinnotheres nudus, chela. 



Fig. 5. Pinnotheres nudus, 1st ambulatory leg. 



Eig. 6. Crj'ptophrys pubescens, general outline. 



Fig. 7. Cryptophrys pubescens, buccal area. 



Fig. 8. Parapinnixa nitida, general outline. 



Fig. 9. Parapinnixa nitida, 3d maxilliped. 



Fig. 10. Pinnixa tomentosa, 3d maxilliped. 



Fig. 11. Pinnixa tomeiilosa, chela. 



Fig. 12. Pinnixa tomentosa, 1st ambulatory leg. 



Fig. 13. Pinnixa tomentosa, 3d ambulatory leg. 



Fig. 14. Pinnixa littoralis, chela. 



Fig. 15. Pinnixa littoralis, front. 



Fig. 16. Pinnixa littoralis, 3d ambulatory leg. 



Eig. 17. Pinnixa tubicola, chela. 



Fig. 18. Pinnixa tubicola, 3d ambulatory leg. 



Fig. 19. Pinnixa longipes, general outline. 



Fig. 20. Pinnixa longipes, 3d maxilliped. 



Fig. 21. Hippolyte californiensis, outline of carapax. 



Fig. 22. Hippolyte californiensis, 2d chela. 



Fig. 23. Hippolyte californiensis, 2d cheliped. 



Eig. 24. Hippolyte ealifornieasis, 3d maxilliped. 



Fig. 25. Hippolyte californiensis, 1st cheliped. 



Fig. 26. Hippolyte californiensis, mandible. 



