CONTENTS. 753 



Page. 



. Habits and distribution of invertebrate animals — Continued. 



General remarks •• 430 



Articulatess 430 



Mollusks . , 432 



Radiates '. 433 



List of species 434 



9. Animals swimming free in the water or floating at the surface 43G 



Genera] remarks 436 



Articulates 438 



Mollusks '. 440 



Radiates ,... 447 



List of species 451 



10. Parasitic animals 455 



Internal parasites 455 



External parasites 457 



List of species 459 



III. — Fauna of the brackish waters of estuaries, harbors, &c 460 



General remarks 460 



1. Animals inhabiting the sandy shores and bottoms 462 



Articulates '. 462 



Mollusks 463 



List of species 464 



2. Animals inhabiting the muddy shores and bottoms 465 



General remarks 465 



Articulates 466 



Mollusks 468 



List of species 470 



3. Animals inhabiting oyster-beds 472 



General remarks 472 



Articulates 476 



Mollusks 475 



Radiates 476 



List of species 476 



, 4. Animals inhabiting the eel-grass. 478 



General remarks 478 



Articulates 479 



Mollusks ■. 479 



List of species 480 



5. Animals inhabiting piles of wharves, bridges, floating timbers, &c 481 



General remarks 481 



Articulates .'. 482 



Mollusks 482 



Radiates 481 



List of species 482 



IV. — Fauna of the colder waters of the ocean shores and outer banks and 



channels 484 



General remarks 484 



1. Animals inhabiting the rocky shores 485 



General remarks 485 



Articulates 4b6 



Mollusks - - 485 



Radiates 487 



S. Mis. 61 48 



