752 CONTENTS. 



Page. 

 A. Habits and distribution of invertebrate animals — Continued. 



3. Animals of the muddy shores along the bays and sounds 366 



General remarks 366 



Articulates : 



Crustacea 367 



Annelids 371 



Mollusks : 



Gastropods 371 



Lamellibranchs 372 



Ascidians 375 



Radiates : 



Echinoderms 376 



Acalephs 376 



List of species 377 



4. Animals inhabiting the piles and timbers of wharves and bridges, 



bottoms of vessels, buoys, and other submerged wood- work 378 



General remarks 378 



Articulates : 



Insects 379 



Crustacea 379 



Annelids and Nemerteans 382 



Mollusks : 



Gastropods 382 



Lamellibranchs 383 



Ascidians 388 



Bryozoa..-. 389 



Eadiates : 



Echinoderms 389 



Acalephs 389 



Polyps 391 



List of species 392 



5. Animals inhabiting the rocky bottoms of the bays and sounds 394 



General remarks 394 



Articulates 395 



Mollusks .399 



Eadiates 406 



, Protozoa 409 



List of species 409 



6. Animals inhabiting gravelly and shelly bottoms 412 



General remarks 412 



Articulates 415 



Mollusks 416 



Eadiates 420 



Protozoa 421 



List of species 421 



7. Animals inhabiting sandy bottoms 425 



General remarks 425 



Articulates 426 



Mollusks 426 



Eadiates 427 



Protozoa 427 



List of apocios 428 



8. Animals inhabiting: muddy bottoms 430 



