XVI CONTENTS. 



PAGE. 



Mites 288293 



Tick (Ixodes) 288 



Sarcoptes passerinus 289 



Acarus domesticus 290 



Cheyletus eruditus 290 



Philodromus limacum 291 



Red Spider 293295 



Chelifer Geoffroyi 295 



Entomostraca 295296 



Cyclopsina castor 295 



Argulus foliaceus 296 



Electric centipede 296 



OBSERVATIONS ON WORMS 298 317 



Small red Ditch-worm 299 301 



Earth-worm 301 



Clay-worm 302 



Thread-worms 303 311 



Worm in a Gnat 311 



Eel in vinegar 31 1 



Liver Fluke 312314 



Ground Fluke 314317 



OBSERVATIONS ON MOLLUSKS 318 328 



Helix lapicida 321 



Helix carthusiana 322 



Cyclostoma elegans 322 



Small fresh-water bivalves 324 328 



REMARKS ON THE IMPORTANCE OF REGISTERS OF PERIODIC 



PHENOMENA IN NATURAL HISTORY 331 365 



CALENDAR OF PERIODIC PHENOMENA IN NATURAL HIS- 

 TORY 366412 



ALPHABETICAL ARRANGEMENT OF THE PHENOMENA IN THE 



FOREGOING CALENDAR 413 428 



GENERAL INDEX... 429 439 



