Page. 



CHAPTER III. — The relation ok marine bionomy -to stratigraphy 319 



General 319 



Bionomic districts 322 



Bionomic characteristics of marine organisms 330 



Bionomic characteristics of the classes of marine invertebrates important 



from a palteontological point of view 336 



Foraminifera 336 



Radiolaria 338 



Spongii^ 338 



Hydrozoa 339 



Anthozoa 343 



Crinoidea 345 



Asteroidea, Ophiuroidea 346 



Echinoidea 347 



Holothuroidea 347 



Nemathelminthes, Gephyrea, Annelida 348 



Bryozoa 349 



Brachiopoda 350 



Pelecypoda 351 



Scaphopoda and Amphineura 354 



Gastropoda 354 



Pteropoda 357 



Cephalopoda 357 



Cirripedia 360 



Ostracoda 361 



Xiphosura 361 



Gigantostraca 362 



TrilobitK 362 



Decapoda 362 



Migration of marine invertebrates 363 



Literature 365 



CHAPTER IV. — Glossary of pal^ontological terms 368 



APPENDIX. — A list of reference works 380 



A. Text books 380 



B. Books of a general character 380 



C. Government reports, etc 381 



D. Special papers in serial publications, etc 382 



