A further apology is due to the other contributors to this volume. Their contributions have been in type for many years, and owing to the inevitable delays indicated above they have been called upon to make old articles new, ever an ungrateful labour.

The appearance of this volume completes the work the Editors embarked on some sixteen years ago. It coincides with the cessation of an almost daily intercourse since the time when they “came up” to Cambridge as freshmen in 1880.

S. F. Harmer.

A. E. Shipley.

March 1909.

CONTENTS

PAGE
Scheme of the Classification adopted in this Volume [xi]
CRUSTACEA
CHAPTER I
CRUSTACEA
General Organisation [3]
CHAPTER II
CRUSTACEA (continued)
Entomostraca—Branchiopoda—Phyllopoda—Cladocera—Water-fleas [18]
CHAPTER III
CRUSTACEA ENTOMOSTRACA (continued)
Copepoda [55]
CHAPTER IV
CRUSTACEA ENTOMOSTRACA (continued)
Cirripedia—Phenomena of Growth and Sex—Ostracoda [79]
CHAPTER V
CRUSTACEA (continued)
Malacostraca: Leptostraca—Phyllocarida: Eumalacostraca: Syncarida—Anaspidacea: Peracarida—Mysidacea—Cumacea—Isopoda—Amphipoda: Hoplocarida—Stomatopoda [110]
CHAPTER VI
CRUSTACEA MALACOSTRACA (continued)
Eumalacostraca (CONTINUED): Eucarida—Euphausiacea—Compound Eyes—Decapoda [144]
CHAPTER VII
CRUSTACEA (continued)
Remarks on the Distribution of Marine and Fresh-water Crustacea [197]
CHAPTER VIII
CRUSTACEA (continued)
Trilobita [221]
ARACHNIDA
CHAPTER IX
Arachnida—Introduction [255]
CHAPTER X
ARACHNIDA (continued)
Delobranchiata = Merostomata—Xiphosura [259]
CHAPTER XI
ARACHNIDA DELOBRANCHIATA (continued)
Eurypterida = Gigantostraca [283]
CHAPTER XII
ARACHNIDA (continued)
Embolobranchiata—Scorpionidea—Pedipalpi [297]
CHAPTER XIII
ARACHNIDA EMBOLOBRANCHIATA (continued)
Araneae—External Structure—Internal Structure [314]
CHAPTER XIV
ARACHNIDA EMBOLOBRANCHIATA (continued)
Araneae (CONTINUED)—Habits—Ecdysis—Treatment of Young—Migration—Webs—Nests—Egg-cocoons—Poison—Fertility—Enemies—Protective Coloration—Mimicry—Senses—Intelligence—Mating Habits—Fossil Spiders [338]
CHAPTER XV
ARACHNIDA EMBOLOBRANCHIATA (continued)
Araneae (CONTINUED)—Classification [384]
CHAPTER XVI
ARACHNIDA EMBOLOBRANCHIATA (continued)
Palpigradi—Solifugae = Solpugae—Chernetidea = Pseudoscorpiones [422]
CHAPTER XVII
ARACHNIDA EMBOLOBRANCHIATA (continued)
Podogona = Ricinulei—Phalangidea = Opiliones—Habits—Structure—Classification [439]
CHAPTER XVIII
ARACHNIDA EMBOLOBRANCHIATA (continued)
Acarina—Harvest-Bugs—Parasitic Mites—Ticks—Spinning Mites—Structure—Metamorphosis—Classification [454]
CHAPTER XIX
ARACHNIDA (APPENDIX I)
Tardigrada—Occurrence—Ecdysis—Structure—Development—Affinities—Biology—Desiccation—Parasites—Systematic [477]
CHAPTER XX
ARACHNIDA (APPENDIX II)
Pentastomida—Occurrence—Economic Importance—Structure—Development and Life-History—Systematic [488]
PYCNOGONIDA
CHAPTER XXI
Pycnogonida [501]
INDEX [543]

SCHEME OF THE CLASSIFICATION ADOPTED IN THIS VOLUME

The names of extinct groups are printed in italics.

CRUSTACEA (p. [3]).
ENTOMOSTRACA (p. [18]).
Divisions. Orders. Sub-Orders. Tribes. Families.
Branchiopoda (p. [18]) Phyllopoda (pp. [19], [35]) Branchipodidae (pp. [19], [35]).
Apodidae (pp. [19], [36]).
Limnadiidae (pp. [20], [36]).
Cladocera (p. [37]) Calyptomera (pp. [38], [51]) Ctenopoda (p. [51]) Sididae (p. [51]).
Holopediidae (p. [51]).
Anomopoda (p. [51]) Daphniidae (p. [51]).
Bosminidae (p. [53]).
Lyncodaphniidae (p. [53]).
Lynceidae = Chydoridae (p. [53]).
Gymnomera (pp. [38], [54]) Polyphemidae (p. [54]).
Leptodoridae (p. [54]).
Divisions. Orders. Sub-Orders. Tribes. Families.
Copepoda (p. [55]) Eucopepoda (p. [57]) Gymnoplea (p. [57]) Amphascandria (p. [57]) Calanidae (p. [57]).
Heterarthrandria (p. [58]) Centropagidae (p. [58]).
Candacidae (p. [60]).
Pontellidae (p. [60]).
Podoplea (p. [61]) Ampharthrandria (p. [61]) Cyclopidae (pp. [61], [62]).
Harpacticidae (pp. [61], [62]).
Peltiidae (p. [63]).
Monstrillidae (p. [63]).
Ascidicolidae (p. [66]).
Asterocheridae (p. [67]).
Dichelestiidae (p. [68]).
Isokerandria (p. [69]) Oncaeidae (p. [69]).
Corycaeidae (p. [69]).
Lichomolgidae (p. [70]).
Ergasilidae (p. [71]).
Bomolochidae (p. [71]).
Chondracanthidae (p. [72]).
Philichthyidae (p. [73]).
Nereicolidae (p. [73]).
Hersiliidae (p. [73]).
Caligidae (p. [73]).
Lernaeidae (p. [74]).
Lernaeopodidae (p. [75]).
Choniostomatidae (p. [76]).
Branchiura (P. [76]) Argulidae (p. [76]).
Cirripedia (p. [79]) Pedunculata (p. [84]) Polyaspidae (p. [84]).
Pentaspidae (p. [87]).
Tetraspidae (p. [88]).
Anaspidae (p. [89]).
Operculata (p. [89]) Verrucidae (p. [91]).
Octomeridae (p. [91]).
Hexameridae (p. [91]).
Tetrameridae (p. [92]).
Acrothoracica (p. [92]).
Ascothoracica (p. [93]).
Apoda (p. [94]).
Rhizocephala (p. [95]).
Ostracoda (p. [107]) Cypridae (p. [107]).
Cytheridae (p. [107]).
Halocypridae (p. [108]).
Cypridinidae (p. [108]).
Polycopidae (p. [109]).
Cytherellidae (p. [109]).
MALACOSTRACA (p. [110]).
LEPTOSTRACA (p. [111])
Phyllocarida (p. [111]).
Divisions. Orders. Sub-Orders. Tribes Families.
EUMALACOSTRACA (p. [112]).
Syncarida (p. [114]) Anaspidacea (p. [115]) Anaspididae (p. [115]).
Koonungidae (p. [117]).
Peracarida (p. [118]) Mysidacea (p. [118]) Eucopiidae (p. [118]).
Lophogastridae (p. [119]).
Mysidae (p. [119]).
Cumacea (p. [120]) Cumidae (p. [121]).
Lampropidae (p. [121]).
Leuconidae (p. [121]).
Diastylidae (p. [121]).
Pseudocumidae (p. [121]).
Isopoda (p. [121]) Chelifera (p. [122]) Apseudidae (p. [122]).
Tanaidae (p. [122]).
Flabellifera (p. [124]) Anthuridae (p. [124]).
Gnathiidae (p. [124]).
Cymothoidae (p. [126]).
Cirolanidae (p. [126]).
Serolidae (p. [126]).
Sphaeromidae (p. [126]).
Valvifera (p. [127]) Idotheidae (p. [127]).
Arcturidae (p. [127]).
Asellota (p. [127]) Asellidae (p. [128]).
Munnopsidae (p. [128]).
Oniscoida (p. [128]).
Epicarida (p. [129]) Cryptoniscina (pp. [129], [130]) Microniscidae (p. [130]).
Cryptoniscidae (p. [130]).
Liriopsidae (p. [130]).
Hemioniscidae (p. [130]).
Cabiropsidae (p. [130]).
Podasconidae (p. [130]).
Asconiscidae (p. [130]).
Bopyrina (pp. [129], [130], [132]) Dajidae (p. [130]).
Phryxidae (p. [130]).
Bopyridae (pp. [130], [133]).
Entoniscidae (pp. [130], [134]).
Phreatoicidea (p. [136]) Phreatoicidae (p. [136])
Amphipoda (p. [136]) Crevettina (p. [137]) Lysianassidae (p. [137]).
Haustoriidae (p. [137]).
Gammaridae (p. [138]).
Talitridae (p. [139]).
Corophiidae (p. [139]).
Laemodipoda (p. [139]) Caprellidae (p. [139]).
Cyamidae (p. [140]).
Hyperina (p. [140]).
Hoplocarida (p. [141]) Stomatopoda (p. [141]) Squillidae (p. [143]).
Eucarida (p. [144]) Euphausiacea (p. [144]) Euphausiidae (p. [144]).
Decapoda (p. [152]) Macrura (p. [153]) Nephropsidea (p. [154]) Nephropsidae (p. [154]).
Astacidae (p. [157]).
Parastacidae (p. [157]).
Eryonidea (p. [157]) Eryonidae (p. [158]).
Peneidea (pp. [158], [162]) Peneidae (p. [162]).
Sergestidae (p. [162]).
Stenopodidae (p. [162]).
Caridea (pp. [158], [163]) Pasiphaeidae (p. [163]).
Acanthephyridae (p. [163]).
Atyidae (p. [163]).
Alpheidae (p. [163]).
Psalidopodidae (p.164).
Pandalidae (p. [164]).
Hippolytidae (p. [164]).
Palaemonidae (p. [164]).
Glyphocrangonidae (p. [164]).
Crangonidae (p. [164]).
Loricata (p. [165]) Palinuridae (p. [167]).
Scyllaridae (p. [167]).
Thalassinidea (p. [167]) Callianassidae (p. [167]).
Anomura (p. [167]) Galatheidea (p. [168]) Aegleidae (p. [169]).
Galatheidae (p. [169]).
Porcellanidae (p. [170]).
Hippidea (p. [170]) Albuneidae (p. [171]).
Hippidae (p. [171]).
Paguridea (p. [171]) Pylochelidae (p. [180]).
Paguridae (p. [180]).
Eupagurinae (p. [180]).
Pagurinae (p. [180]).
Coenobitidae (p. [181]).
Lithodidae (p. [181]).
Hapalogastorinae (p. [181]).
Lithodinae (p. [181]).
Brachyura (p. [181]) Dromiacea (p. [183]) Dromiidae (p. [184]).
Dynomenidae (p. [184]).
Homolidae (p. [184]).
Oxystomata (p. [185]) Calappidae (p. [187]).
Leucosiidae (p. [188]).
Dorippidae (p. [188]).
Raninidae (p. [188]).
Cyclometopa (p. [188]) Corystidae (p. [190]).
Atelecyclidae (p. [190]).
Cancridae (p. [191]).
Portunidae (p. [191]).
Xanthidae (p. [191]).
Thelphusidae = Potamonidae (p. [191]).
Oxyrhyncha (p. [191]) Maiidae (p. [193]).
Parthenopidae (p. [193]).
Hymenosomatidae (p. [193]).
Catometopa (p. [193]) Carcinoplacidae (p. [195]).
Gonoplacidae (p. [195]).
Pinnotheridae (p. [195]).
Grapsidae (p. [196]).
Gecarcinidae (p. [196]).
Ocypodidae (p. [196]).