CONTENTS vii 



I'AGE 



fugce) The False Scorpions (Order P8wdo*corpiones)The Harvest-Spiders (Order 

 Opiliones) Suborder Laniatores Suborder Palpatores Group Ricinulei ~ The 

 Mites and Ticks (Order A cari) Aberrant Types, . 204 



CHAPTER VII. THE JOINTED ANIMALS, concluded. THE SEA-SPIDERS, KING-CRABS, 

 CRUSTACEANS, etc., Classes Pantopoda, Giyantostraca, Crustacea, etc. 



Characters of Sea-Spiders The King-Crabs (Class Gigantostraca) Existing Forms (Order 

 Xiphosura) Order Merostomata Order Trilobita Crabs, Lobsters, Crayfish, etc. 

 (Class Crustacea) Characteristics of the Class Typical Crustaceans (Subclass Malaco- 

 .s/rara) Order Decapoda Short- Tailed Group (Suborder Brachyura) Long-Tailed 

 Group (Suborder Macrura) Cleft-Footed Group (Order Schizopoda) The Mantis- 

 Shrimps (Order Stomatopoda) Sessile-Eyed Series (Edriophthalmata) Order Isopoda 

 Order Amphipoda Subclass Entomostraca The Barnacles (Order Cirripedia) 

 Bivalved Group (Order Ostracoda) Oar- Footed Group (Order Copepodd) Order 

 Cladocera Leaf -Footed Group (Order Phyllopoda) Class Prototracheata, . . 248 



CHAPTER VIII. STONE-LILIES, STAR-FISHES, SEA-URCHINS, AND SEA-CUCUMBERS, 



Subkingdom Echinodermata. 



CHARACTERISTICS OF THE GROUP Distinction of the Classes Mode of Life The Cystids (Class 

 Cystidea) The Stone-Lilies or Crinoids (Class Crinoidea) The Blastoids (Class Blas- 

 toidea) The Star-Fishes (Class Asteroidea) The Brittle Stars (Class Ophiuroidea) 

 The Sea-Urchins (Class Echinoidea)The Sea-Cucumbers (Class Holothuroidea) De- 

 velopment of Echinoderrns, ........ 289 



CHAPTER IX. THE MOLLUSCS, OR SHELL-FISH, Subkingdom Mollusca. 



Definition of the Group Growth Coloration Age Reproductive System Food Organs 

 of Sense Locomotion Uses in Nature and to Man Noxious Molluscs Distribution 

 Classification Squids, Cuttle-Fishes, and Nautili (Class Cephalopoda) Characteristics 

 Two-Gilled Group (Order Dibranchiata) Octopus Tribe (Odopodidce) Other Families 

 Argonautidce Suborder Decapoda Squids (Loliginidce) Sepiolidce Onychoteuthidce 

 and Chiroteuthidce The Cuttle-Fishes (Sepiidce) Spirulidce Four-Gilled Group (Order 

 Tetrabranchiata)Nautilidce Allied Families, ...... 320 



CHAPTER X. THE MOLLUSCS, continued. Class Gastropoda. 



Distinctive Features of Gastropods Lung-Breathing Group (Order Pulmonata) Suborder 

 Stylommatophora Shelled Slugs (Testacellidce) True Slugs (Limacidce) The Snail 

 Tribe (Helicidce) Other Families Suborder Basommatophora Earlet Shells (Auri- 

 culidce} Pond-Snails, etc. (Limnceidce, Physidce, and Chilinidce) Hind-Gilled Group 

 (Order Opisthobranchiata) Naked-Gilled Subgroup (Suborder Nudibranchiata) Sec- 

 tion Anthobranchiata Doris Tribe (Doridopsidce, Doridce, etc.) Section Inferobranchiata 

 Section Polybranchiata Section Pellibranchiata Section Parasita Covered-Gilled 

 Subgroup (Suborder Tectibranchiata} Suborder Pteropoda Sections Gymnosomata and 

 Thecosomata Front-Gilled Group (Order Prosobranchiata} Suborder Pectinibranchiata 

 Section Toxoglossa Cones (Conidce) Auger -Shells (Terebridce) Pleurotomidce 

 Cancellariidce Section Rhachiglossa Olives (Olividw)Raxv$(Harpid(E)MarginelUd(K 

 Volutes (Volutidce) Tulip- Shells (Fasciolariidce) Conch-Shells (Turbinellidce) 

 Whelks (Buccinidce)- Dog- Whelks (Nassidce) Dove-Shells (Columbellidce) Murices 

 (Muricidai) Section Tanioglossa Tritons (Tritonidce) Tun-Shells (Doliida;) Cowries 

 ( Cyprmdce) Wing-Shells (Strombidce)Cerithiidce Worm-Shells ( Vermetidce)Melan- 

 iidce St repopomatidte Periwinkles (Littorinidce)Rissoid(cHydrobiidce Viviparous 



