XIV 



LIST OF ILLUSTRATIONS 



Page 

 Fission-Chain of Planarian Worms (Micro- 



stomum) (after von Graft") - - - 329 

 Part of Branching Colony of an Annelid 



(Syllis ramosa) (after M'Intosh) - - 330 

 Winter-Buds of Moss-Polypes (after Krae- 



pelin and Allman) - - - 331 



Volvox (after Btitschli and Cienkowsky) - 334 

 Formation of Polar Bodies - - - 336 

 Freshwater Polype (Hydra) (after Vogt and 



Yung) - 339 



Development of Freshwater Polype(ffydra) 



(after Braner) 340 



Development of a Sponge (after Haeckel)- 343 

 Young Embryos of Lancelet (Amphioxus] 



(after Hatschek) 344 



Older Embryos of Lancelet (Amphioxus) 



(after Hatschek) - 345 



Influence of Food -yolk on Development 



(after Selenka) - 346 



Section through a Hen's Egg (after A. 



Thompson and Balfour) 347 



Life-history of Syncoryne (after Perrier) - 350 

 Life-history of Campanularia (after Allman) 35 1 

 Gonophores of various Zoophytes (after 



Hatschek and Gegenbaur) - - - 351 

 Life-history of Aurelia (after Perrier) - 352 

 Creeping Eggs of a Jelly-Fish (Amalthcea 



amcebigerd) (after Haeckel) - - - 353 

 Egg-cell of a Coral ( Corallimorphus rigidus} 



(after R. Hertwig) - 353 



Life-history of a Brittle-Star (from Ziegler's 



models) 354 



Nursing of young Sea-Urchins (Hemiaster 



cavernostts) (after A. Agassiz) - - 355 

 Sea- Urchins burrowing (after Walther) - 356 

 Heart- Urchin (Amphidotus cordattts) in its 



Burrow (from Graber) - 357 

 Nursing of young Star-Fishes (Leptopty- 

 chastcr Kerguelensis) (after the "Chal- 

 lenger " Reports) 357 



Auricularia (after J. Mtiller) - - - 357 

 A Female Bristle- Worm (Autolytiis prolifer) 



carrying her Eggs (after Perrier) - - 358 

 Spirorbis (after Claparede) - - - 359 

 Trochospheres of Polygordius (after Frai- 



pont) -359 



Larva of a Bristle-Worm (after A. Agassiz) 360 

 Cocoons of Earth- Worms (after Vejdovsky) 361 

 Brood-pouch of Apus (after Ray Lankester) 362 

 Water-Flea (Daphnia) with Eggs (after 



Claus and R. Hertwig) ... 363 

 Female Cyclops with Egg-bags (after Claus) 364 

 Nauplius Larva (after Nordmann) - - 364 

 Female Sand-Hopper ( Gammarusneglectus) 



carrying Eggs (after Sars) - - - 365 

 Life-history of Edible Crab ( Cancer pagurtis) 366 

 Just-hatched Crayfishes (after Huxley) - 368 



Page 



Alima Larva (after Claus) - - - 368 



Larva of King-Crab (Linndus polyphemus) 



(after Kingsley) .... 369 



Nest of House-Spider ( Tegenaria domestica} 



(after Hermann) ----- 374 

 Water Spiders (Argyroneta aquatica) and 



Nests 375 



Trap-door Spiders (Cteniza c&mentaria) 



and Nests 376 



Life-history of Earwig (Forficula auricu- 



laria) - .378 



Praying Mantis 378 



Red-legged Locust (Melanoplus femur - 



rubrum) (after Fletcher) - - - 379 

 A Green Grasshopper (Decticus verruci- 



vorus) laying her Eggs - - - 380 

 Home of Mole-Cricket (Gryllotalpa cam- 



pestris) 381 



Apple Scale-Insect (Mytilaspis pomorum} 



(after Howard) - - - - 381 



Turnip-Flower Aphis (Aphis floris-rapce) 



(from Curtis) 382 



Eggs of Water-Bugs (from Vosseler) - - 383 

 Life-history of a Dragon-Fly (Libellula de- 



pressa) 384 



Caddis-Moth (Phryganea striata] and its 



Larva 385 



Larvaand Pupa of a Caddis-Moth ( Oxyethira 



costalis) (from Vosseler) - - - 385 

 Land-Caddis (Enoicyla pusilla) (after Rit- 



sema) - - 386 



Ovipositor of Female Wood-Wasp (Sirex 



gigas} (from Graber) - ... 386 

 Cross-section through Ovipositor of Wood- 

 Wasp (Sirex gigas) (from Graber) - - 387 

 Corn Saw-Fly (Cephtis pygmceus) (from 



Curtis)- - - 388 



Ovipositor of Rose S&w-Y\y(Hylotoma roscz) 



(after Lacaze-Duthiers) - 388 



Turnip Saw-Fly (Athalia spinaruni) (from 



Curtis)- 389 



Carpenter Bee (Xylocopa violacea) - - 390 

 Nests of Solitary Wasps (after Andre) - 392 

 Long-horned Oak-Beetle (Cerambyx heros) 394 

 Birch -Weevil (Rhynchites betula) (after 



Sharp and Debey) .... 395 



Sexton-Beetles (Necrophorus} - - - 397 

 Great Black Water -Beetle (Hydrophilus 

 piceus) ------- 398 



Cabbage Butterfly (Pieris brassica) (from 



Curtis)- - - - .399 



Silver-Y M.o\h(Plusia gamma) (from Curtis) 401 

 Heart-and-Dart Moth (Agrotis exclama- 



tionis) (from Curtis) - 401 



Indian Skipper Butterfly (Badamia excla- 



mationis) (after Dudgeon) - - 402 



Hover-Flies (from Curtis) - - - 402 



