Asaphidae (p. [249]).

Bronteidae (p. [249]).

Phacopidae (p. [249]).

Cheiruridae (p. [250]).

Proëtidae (p. [251]).

Encrinuridae (p. [251]).

Acidaspidae (p. [251]).

Lichadidae (p. [252]).

ARACHNIDA (p. [255]).
DELOBRANCHIATA = MEROSTOMATA (pp. [258], [259]).
Orders. Sub-Orders. Families. Sub-Families.
Xiphosura (pp. [258], [259], [276]) Xiphosuridae (p. [276]) Xiphosurinae (p. [276]).
Tachypleinae (p. [276]).
Eurypterida = Gigantostraca (pp. [258], [283]) Eurypteridae (p. [290]).
EMBOLOBRANCHIATA (pp. [258], [297]).
Scorpionidea (pp. [258], [297]) Buthidae (p. [306]) Buthinae (p. [306]).
Centrurinae (p. [306]).
Scorpionidae (p. [306]) Diplocentrinae (p. [307]).
Urodacinae (p. [307]).
Scorpioninae (p. [307]).
Hemiscorpioninae (p. [307]).
Ischnurinae (p. [307]).
Chaerilidae (p. [307]).
Chactidae (p. [307]) Megacorminae (p. [308]).
Euscorpiinae (p. [308]).
Chactinae (p. [308]).
Vejovidae (p. [308]).
Bothriuridae (p. [308]).
Pedipalpi (pp. [258], [308]) Thelyphonidae (p. [312]).
Schizonotidae = Tartaridae (p. [312]).
Tarantulidae = Phrynidae (p. [312]) Tarantulinae (p. [313]).
Phrynichinae (p. [313]).
Charontinae (p. [313]).
Araneae (pp. [258], [314]) Liphistiidae (p. [386]).
Aviculariidae = Mygalidae (p. [386]) Paratropidinae (p. [387]).
Actinopodinae (p. [387]).
Miginae (p. [387]).
Ctenizinae (p. [388]).
Barychelinae (p. [389]).
Aviculariinae (p. [389]).
Diplurinae (p. [390]).
Atypidae (p. [390]).
Filistatidae (p. [391]).
Oecobiidae = Urocteidae (p. [392]).
Sicariidae = Scytodidae (p. [393]).
Hypochilidae (p. [393]).
Leptonetidae (p. [393]).
Oonopidae (p. [393]).
Hadrotarsidae (p. [394]).
Dysderidae (p. [394]) Dysderinae (p. [394]).
Segestriinae (p. [395]).
Caponiidae (p. [395]).
Prodidomidae (p. [395]).
Drassidae (p. [396]) Drassinae (p. [396]).
Clubioninae (p. [397]).
Liocraninae (p. [397]).
Micariinae (p. [397]).
Palpimanidae (p. [398]).
Eresidae (p. [398]).
Dictynidae (p. [398]).
Psechridae (p. [399]).
Zodariidae = Enyoidae (p. [399]).
Hersiliidae (p. [400]).
Pholcidae (p. [401]).
Theridiidae (p. [401]) Argyrodinae (p. [402]).
Episininae (p. [402]).
Theridioninae (p. [403]).
Phoroncidiinae (p. [404]).
Erigoninae (p. [404]).
Formicinae (p. [405]).
Linyphiinae (p. [405]).
Epeiridae (p. [406]) Theridiosomatinae (p. [407]).
Tetragnathinae (p. [407]).
Argiopinae (p. [408]).
Nephilinae (p. [408]).
Epeirinae (p. [408]).
Gasteracanthinae (p. [409]).
Poltyinae (p. [410]).
Arcyinae (p. [410]).
Uloboridae (p. [410]) Dinopinae (p. [410]).
Uloborinae (p. [410]).
Miagrammopinae (p. [411]).
Archeidae (p. [411]).
Mimetidae (p. [411]).
Thomisidae (p. [412]) Thomisinae = Misumeninae (p. [412]).
Philodrominae (p. [413]).
Sparassinae (p. [414]).
Aphantochilinae (p. [414]).
Stephanopsinae (p. [414]).
Selenopinae (p. [414]).
Zoropsidae (p. [415]).
Platoridae (p. [415]).
Agelenidae (p. [415]) Cybaeinae (p. [415]).
Ageleninae (p. [416]).
Hahniinae (p. [416]).
Nicodaminae (p. [416]).
Pisauridae (p.416).
Lycosidae (p. [417]).
Ctenidae (p. [418]).
Senoculidae (p. [418]).
Oxyopidae (p. [419]).
Attidae = Salticidae (p. [419]).
Palpigradi (pp. [258], [422]).
Solifugae = Solpugae (pp. [258], [423]) Galeodidae (p. [428]).
Solpugidae (p. [429]) Rhagodinae (p. [429]).
Solpuginae (p. [429]).
Daesiinae (p. [429]).
Eremobatinae (p. [429]).
Karshiinae (p. [429]).
Hexisopodidae (p. [429]).
Chernetidea = Chernetes = Pseudoscorpiones (pp. [258], [430]) Cheliferinae (p. [436]). Cheliferidae (p. [436])
Garypinae (pp. [436], [437]).
Obisiinae (pp. [436], [437]).
Podogona = Ricinulei (pp. [258], [439]) Cryptosteinmatidae (p.440).
Phalangidea = Opiliones (pp. [258], [440]) Cyphophthalmi (p. [447]) Sironidae (p. [448]).
Mecostethi = Laniatores (p. [448]) Phalangodidae (p. [448]).
Cosmetidae (p. [449]).
Gonyleptidae (p. [449]).
Plagiostethi = Palpatores (p. [449]) Phalangiidae (p. [449]) Sclerosomatinac (p.449).
Phalangiinae (p. [450]).
Ischyropsalidae (p. [451]).
Nemastomatidae (p. [451]).
Trogulidae (p. [452]).
Acarina = Acari = Acaridea (pp. [258], [454]) Vermiformia (p. [464]) Eriophyidae = Phytoptidae (p. [464]).
Demodicidae (p. [465]).
Astigmata (p. [465]) Sarcoptidae (p. [466]) Sarcoptinae (p. [466]).
Analgesinae (p. [466]).
Tyroglyphinae (p. [466]).
Metastigmata (p. [467]) Oribatidae (p. [467]).
Ixodoidea (p. [468]) Argasidae (p. [469]).
Ixodidae (p. [469]).
Gamasidae (p. [470]) Gamasinae (p. [470]).
Dermanyssinae (p. [471]).
Heterostigmata (p. [471]) Tarsonemidae (p. [471]).
Prostigmata (p. [471]) Bdellidae (p. [471]).
Halacaridae (p. [472]).
Hydrachnidae (p. [472]).
Trombidiidae (p. [472]) Limnocharinae (p. [472]).
Caeculinae (p. [472]).
Tetranychinae (p. [472]).
Cheyletinae (p. [473]).
Erythraeinae (p. [473]).
Trombidiinae (p. [473]).
Notostigmata (p. [473]) Opilioacaridae (p. [473]).

Orders.