viii CONTENTS 



Page 



and Tube-Dwellers (e.g. Spirorbis). Trochosphere Larva. Life-History of 

 Polygordius. Direct Development in Earthworms; their Cocoons - - - 358 



Leeches (Discophora] Direct Development; their Cocoons. Nursing of 

 Young in Glossiphonia ... . 361 



LIFE-HISTORIES, &c., OF CRUSTACEANS (CRUSTACEA) Lower Crustaceans 

 (Entomostraca} Leaf-footed Crustaceans (Phyllopoda) Brood-Pouches of 

 Apus and Water- Flea (Daphnia pulex] ; Winter- and Summer-Eggs of the 

 latter. Fork-footed Crustaceans (Copepoda) Egg-Bags and Brood-Pouches. 

 Barnacles (Cirripedia) Care of Eggs in Ship- Barnacle (Lepas] and Acorn- 

 Barnacle (Balanus}. Mussel- Shrimps (Ostracoda) Care of Eggs. The 

 Nauplius Larva ; its Relation to the Trochosphere - - - 362 



Higher Crustaceans (Malacostracd] Mud-Shrimps (Leptostraca) Direct 

 Development. Sessile-eyed Crustaceans (Arthrostraca) Sand-Hopper (Gain- 

 marus], Brood-Pouch; Direct Development. Stalk-eyed Crustaceans (Thora- 

 costraca) Opossum-Shrimp (Mysis\ Brood-Pouch, Direct Development ; Care 

 of Eggs in Lobsters, &c.; Life-History of the Edible Crab (Cancer pagurus), 

 Zoaea Larva, Megalopa Stage; Life-History of Crayfish (Astacus fluviatilis] 

 Direct Development - 365 



Crustacean Dwellings Crabs, Rock- Lobster (Palinurus)\ Mantis-Shrimp 

 (Squilla mantis), Alima Larva; Caddis-Shrimps (CorophiidcB) - - - - 368 



LIFE-HISTORY, &c., OF KiNG-CRABS (XlPHOSURA) King- Crab (Limulus) and its 



Trilobite Larva - ... - 369 



LIFE-HISTORIES, &c., OF PRIMITIVE TRACHEATES (PROTOTRACHEATA) Peripatus; 



Viviparous Development ; Variations in Amount of Food-Yolk - 370 



LIFE-HISTORIES, &C., OF CENTIPEDES AND MILLIPEDES (MYRIAPODA) Care of 



Eggs in the Thirty-Foot (Lithobius forficatus], the Earth Snake- Millipede 

 (Julus terrestris\ and Polyzonium Germanicum 370 



LIFE-HISTORIES, &c., OF SPIDER-LIKE ANIMALS (ARACHNIDA) Scorpions 

 (Scorpionidse). Spiders (Araneidae) Wolf-Spiders (Lycosidtz], House-Spiders 

 (Tegenaria\ Hedge-Spiders (Agalena), Theridium nervosum, Water-Spider 

 (Argyroneta aquatica], Trap-door Spiders (Ctenizidtz) - 373 



LlFE-HlSTORlES, &C., OF INSECTS (INSECTA) Varying Degrees of Metamorphosis. 



Length of Life - 377 



Primitive Wingless Insects (Aptera] Tassel-tails and Spring-tails - 377 



Straight-winged Insects (Orthoptera) Earwig (Forficula auricularia], Cock- 

 roach (Periplanetaorientalis), Soothsayers (Mantidce\ Stick- and Leaf-Insects 

 (Phasmida\ Locusts and Grasshoppers (Acridiidce\ Green Grasshoppers 

 (Locustid(E}\ Crickets (Gryllidce] Mole-Cricket (Gryllotalpa campestris] - - 377 



Bugs (Hemiptera} Tree-Bugs (Cicadidcz) Seventeen-Year Cicada (Cicada 

 septendecini) ; Scale-Insects (Coccidce) ; Aphides or Plant-Lice (Aphides} He- 

 terogeny; Care of Eggs in Aquatic Bugs Halobates, Diplonychus, Nepa, 

 Ranatra 380 



Net-winged Insects (Neuroptera) Dragon-Flies (Odonatd]\ Caddis-Flies 

 (Phryganeidtz) -------- 383 



