LIST OF ILLUSTRATIONS 



Page 

 Fission-Chain of Planarian Worms {A/icro- 



stomtnn) (after von Graff) - - - 329 

 Part of Branching Colony of an Annelid 



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

 Winter-Buds of Moss-Polypes (after Krae- 



pelin and Allman) - - . - 231 



Volvox (after Butschli and Cienkowsky) - 334 

 Formation of Polar Bodies - - - 336 

 Freshwater Polype (Hydra) (after Vogt and 



Yung) - - 339 



Development of Freshwater Polype (Hydra) 



(after Braner) ----- 340 

 Development of a Sponge (after Haeckel)- 343 

 Young Embryos of Lancelet (Amphioxus) 



(after Hatschek) 344 



Older Embryos of Lancelet (Aniphioxiis) 



(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) 351 

 Gonophores of various Zoophytes (after 



Hatschek and Gegenbaur) - - - 351 

 Life-history of Aurelia (after Perrier) - 352 



Creeping Eggs of a Jelly-Fish (A>nalihiEa 



amcebigera) (after Haeckel) - - - 353 

 Egg-cell of a Coral ( CoralHinorplnis rigidits) 



(after R. Hertwig) . . . - 353 



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



models) ------ 354 



Nursing of young Sea-Urchins (Hetiiiaster 



caveniosiis) (after A. Agassiz) - - 355 



Sea-Urchins burrowing (after Walther) - 356 

 Heart-Urchin (Aniphidottis cordatus) in its 



Burrow (from Graber) - - - - 357 

 Nursing of young Star-Fishes (Leptopty- 



chaster Kergnelensis) (after the " Chal- 

 lenger" Reports)- - - - - 357 

 Auricularia (after J. Miiller) - - - 357 

 AFemale Bristle- Worm (Autolytus 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-Hopiier(CaOTOTa;7«z;«f'/t.YY/«) 



carrying Eggs (after Sars) - - - 365 

 Life-historyof Edible Crab (Ca;/«)-/(r^?OT7H) 366 

 Just-hatched Crayfishes (after Huxley) - 368 



Page 



Alima Larva (after Claus) - - ■ 368 



Larva of ICing-Crab (Limulus polyphenms) 



(after Kingsley) 369 



Nest of Flouse-Spider ( Tegenaria doniestica) 



(after Hermann) ----- 374 

 Water Spiders (Argyroneta aquatica) and 



Nests 375 



Trap-door Spiders (Cteniza ccementaria) 



and Nests ------ 376 



Life-history of Earwig (Forjiaila aiiricti- 



laria) ------- 378 



Praying Mantis ----- 378 



Red-legged Locust (Rlelanoplus femur- 



ritbriuu) (after Fletcher) - - - 379 

 A Green Grasshopper (Decticus verruci- 



■t.'07'us) laying her Eggs - - - 380 



Home of Mole-Cricket (Gryllotalpa cani- 



pesiris) - - - - - - 381 



Apple Scale-Insect (Mytilaspis poviortim) 



(after Howard) 381 



Turnip-Flower Aphis (Aphis Jioris-rap{z) 



(from Curtis) 382 



Eggs of Water-Bugs (from Vosseler) - - 3S3 

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



pressa) ------- 3S4 



Caddis-Moth (Phrygaiiea sti-iata) and its 



Larva ------- 385 



Larvaand Pupaof a Caddis-Moth ( Oxyethira 



costalis) (from Vosseler) - - - 385 



Land-Caddis (Enoityla pusilla) (after Rit- 



sema) ------- 386 



Ovipositor of Female Wood-Wasp (Sirex 



gigas) (from Graber) - - - - 3S6 

 Cross-section through Ovipositor of Wood- 

 Wasp (JTz'rtjjr^z^aj) (from Graber) - - 3S7 

 Corn Saw-Fly (Cephiis pygmc^tts) (from 



Curtis) 388 



Ovipositor of Rose Saw-Fly (Z^j'/tp^'t^wa ros<^) 



(after Lacaze-Duthiers) - - - - 388 

 Turnip Saw-Fly (Atliatia spiiiariim) (from 



Curtis) ------- 389 



Carpenter Bee (Xylocopa violacea) - - 390 

 Nests of Solitary Wasps (after Andre) - 392 

 Long-horned Oak-Beetle (Cerambyx Jwros) 394 

 Birch -Weevil (Rhynchites betulce) (after 



Sharp and Debey) . . - - 395 

 Sexton-Beetles (Necrophorus) - - - 397 

 Great Black Water -Beetle (Hydrophilus 



piccits) ------- 398 



Cabbage Butterfl)^ (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 



