CRUSTACEA. 





INTRODUCTORY REMARKS. 



The collections of Crustacea, which are the subject of the following 

 Report, were made by the Exploring Expedition at all the various 

 points visited in the course of the cruise, and through all the 

 oceans traversed. The principal coasts which have contributed to 

 the department are as follows : 



1. Madeira, 



2. Cape Verde, 



3. Rio Janeiro, 



4. Rio Negro, Northern Patagonia, 



5. Nassau Bay, Tierra del Fuego, 



6. Valparaiso, Chili, 



7. Callao, Peru, 



8. San Francisco, California, 



9. Coast of Oregon, 



10. Sandwich Islands, 



11. Paumotu Islands, Pacific, 



12. Society Islands, 



13. Samoan or Navigator Islands, 



14. Tongatabu, 



15. Feejee Islands, 



16. New Zealand, 



17. New South Wales, 



18. Kingsmill Islands, 



19. Wakes Island, 



20. The Phillippines, Sooloo Sea, Singa- 



pore, and Cape Town. 



Our stay at these different places varied from twenty-four hours to 

 four months ; and the extent of the collections they afforded is conse- 

 quently as various as the time allowed for exploration. The waters 

 of the Atlantic, Pacific, Antarctic, and! Indian Oceans also added 

 largely to the number of oceanic species. 



The scientific world naturally demands results correspondent with 

 the opportunities for investigation. As bearing on this point, the 



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