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CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE I. 



The figures were drawn by means of a camera lucida. 



Fig. 1. Epialtus productus, carapace. 



Fig. 2. Cycloxanthops novem-dentatus. 



Fig. 3. Lophoxanthus bellus, carapace. 



Fig, 4. " leucomanus, carapace. 



Fig. 5. " frontalis, carapace. 



Fig. 6. " " hand. 



Fig. 7. Uca crenulata, carapace. 



Fig. 8. " ** - outer maxilliped. 



Fig. 9. " " , inner side of large hand. 



Fig. 10. " recUlata, carapace. 



Fig. 11. " " inner side of large hand. 



Fig. 12. " " maxilliped. 



Fig. 13. " " merus of large cheliped. 



Fig. 14. " " carpus and hand of small cheliped. 



Fig. 15. PetroUsthes eriomerus, cheliped. 



Fig. 16. Dermaturus Mandtii, acicle. 



Fig. 17. (Edigiiathus Brandtii, acicle. 



Fig. 18. " " outer maxilliped. 



Fig. 19. " '* squamaB of the carapace (enlarged). 



Fig. 20. " " outline of the carapace. 



