LIST OF ILLUSTRATIONS 



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Mouth- Organs of Sheep-Tick 



English Sheep-Tick, 



Dog- or Sheep-Tick, 



Pigeon-Tick, 



Cheese-Mite 



Itch-Mite, . 



Demodex folliculorum, 



A Spider's Spinnerets, 



Slender Sea-Spider, 



Shore-Spider, 



Chinese King-Crab, 



A Trilobite, 



Nauplius Larva of Barnacl 



Zoaea Stage of Crab, 



Jaws of Crayfish, . 



Young Edible Crab, 



Swimming Crab, . 



Indian Land-Crab, 



Swift Land-Crab, . 



Calling-Crab, 



Thornback Crab, . 



Long-Beaked Spider-Crab 



Dromia Crab, 



Broad-Clawed Porcelain-Crab, 



One- Clawed Lobster, 



Larva of Crayfish, . 



Slender-Clawed Crayfish, 



Common Crayfish, 



Common Prawn, . 



West Indian Prawn, 



Mussel-Prawn and Sponge-Prawn 



Hooded Shrimj), . 



Long-Necked Shrimp, 



Mantis-Shrimp, 



Serolis bromleyana, . 



Sphieroma, . 



Male and Female Gnathia, 



Common and Pill Wood- Lice, 



Fresh-Water Shrimp, 



Sand-Hopper, 



Spiny Shrimp, 



Gigantic Andania, 



Skeleton-Shrimp, . 



Whale- Louse, 



Transparent Ocean-Shrimp 



Phronima, . 



Barnacles attached to Pumice 



Acorn-Barnacle, 



Stalkless Barnacle, 



Parasitic Cirripedes, 



Parasitic Barnacles, 



Copepods, . 



Fish- Lice, . 



Spiny-Tailed Water-Flea, 



