LIST OF ILLUSTRATIONS 



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Pigeon Tick, .... 3212 



Cheese Mite, . . . . 3212 



Itch Mite, ..... 3213 



Demodex folliculorum, . . . 3213 



A Spider's Spinnerets, . . . 3214 



Slender Sea Spider, . . . 3215 



Shore Spider, .... 3216 



Chinese King Crab, . . . 3217 



A Trilobite, .... 3219 



Nauplius Larva of Barnacle, . . 3220 



Zoaea Stage of Crab, . . . 3221 



Jaws of Crawfish, .... 3221 



Young Edible Crab, . . . 3223 



Swimming Crab, .... 3223 



Indian Land Crab, .... 3224 



Swift Land Crab, .... 3225 



Calling Crab, .... 3225 



Thornback Crab, .... 3226 



Long-Beaked Spider Crab, . . 3228 



Dromia Crab, .... 3228 



Broad-Clawed Porcelain Crab, . . 3229 



One-Clawed Lobster, . .. . 3231 



Larva of Crawfish, . . . 3232 



Slender-Clawed Crawfish, . . 3232 



Common Crawfish, . . . 3 2 33 



Common Prawn, .... 3234 



West-Indian Prawn, . . . 3235 



Mussel Prawn and Sponge Prawn, . 3236 



Hooded Shrimp, .... 3236 



Long-Necked Shrimp, . . . 3237 



Mantis Shrimp, .... 3239 



Scrolis bromleyana, . . , 3240 



Sphceroma, ..... 3241 



Male and Female Gnathia, . . 3241 



Common and Pill Wood Lice, . . 3242 



Fresh- Water Shrimp, . . . 3243 



Sand Hopper, .... 3243 



Spiny Shrimp, .... 3243 



Gigantic Andania, .... 3244 



Skeleton Shrimp, . . . 3244 



Whale Louse, .... 3245 



Transparent Ocean Shrimp, . . 3245 



Phronima, . . . . . 3246 



Barnacles attached to Pumice, . . 3247 



Acorn Barnacle, .... 3248 



Stalkless Barnacle, . . . 3248 



Parasitic Cirripedes, . . . 3248 



Parasitic Barnacles, . . . 3248 



Copepods, ..... 3249 



Fish Lice, ..... 3250 



Spiny-Tailed Water Flea, . . 3251 



Egg Capsule of Water Flea, . . 3252 



Glassy Leptodora, .... 3253 



Scale-Tailed Apus, . . . 3254 



Branchipus and Brine Shrimp, . . 3254 



Peripatus, ..... 3255 



Anchor Sea Cucumber, . . . 3257 



Sea Cucumbers and Brittle Star, . . 3258 



Ambulacral System of Starfish, . . 3259 



Group of Stone Lilies, . . . 3261 



Lofoden Root Crinoid, . . . 3264 



Medusa Head Pentacrinid, . . 3266 



Rosy Feather Star and Sabella, . . 3267 



Parasitic Swellings on Crinoids, . . 3270 



Blue China Starfish, . . . 3271 



Pedicellarice, .... 3272 



Starfish Turning Over, . . . 3273 



Common Brittle Star, . . . 3274 



Edible Sea Urchin, . . . 3275 



Jaws of Stone Urchin, . . . 3276 



Shield Urchin, .... 3276 



Fiddle Heart Urchin, . . . 3277 



Phial-Shaped Pourtalesia, . . 3278 



Leather Urchin, .... 3278 



U-Shaped Sea Cucumber, . . 3279 



A Deep-Sea Holothurian (Scotoplana), . 3280 



" " (Psychropotes), . 3281 



Club-Like Sea Cucumber, . . 3281 



A Plated Holothurian, . . . 3281 



Green Snake Star, .... 3282 

 Development of a Sea Urchin (Stages 1-8), 3283 



(Stage 9), 3283 



(Stage 10), 3284 



Young Sea Urchin, . . . 3285 



Brood Pouch of Sea Urchin, . . 3286 



Beak of Cuttlefish, ... 3295 



Common Octopus, .... 3297 



Shell of Female Argonaut, . . 3300 



Male Argonaut, .... 3301 



Common Squid, .... 3303 



Scpiola, ..... 3305 



Shell of Spirilla, .... 3306 



Section of Shell of Pearly Nautilus, . 3307 



A Ceratite, ..... 3308 



An Ammonite, .... 3308 



Shell-Bearing Slug (Testacella), . . 3312 



Glass-Snail and Amber-Snail, . . 3313 



Black Slug, . . . . . 3314 

 Clausilia, . . . . .3316 



Agate Snail (Achatina), . . . 3317 



Pythia scarabfPtis, .... 3318 



Earlet Shell (Auricula), . . . 3318 



Embryo of River Limpet, . . . 3319 



Teeth of Snails, .... 3319 



Common Pond Snail (L,imneea), . . 3320 



Various Forms of f,itnncea, . . 3320 



Ramshorn Snail (Planorbis), . . 3321 



Circulation in Pleurobranchus, . . 3322 



Acanf/iodoris filosa, . . . 3323 



Ancula cristata, .... 3325 



