Page:EB1911 - Volume 28.djvu/1061

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1034
ZOOLOGY


Grade B. Metazoa.
Branch a. Parazoa.
Phylum 1. Porifera (see Sponges).
Sub-phylum 1. Calcarea.
Class. Calcarea.
Orders: Homocoela, Heterocoela.
Sub-phylum 2. Non-Calcarea.
Class 1. Myxospongida.
Order: Myxospongida.
Class 2. Triaxonida ( = Hexactinellida).
Orders: Amphidiscophora, Hexasterophora.
Class 3. Tetraxonida.
Sub-Class1. Tetractinellida.
Orders: Homosclerophora, Astrophora, Sigmatophora.
Sub-class 2. Lithistida.
No Orders.
Sub-class 3. Monaxonellida.
Orders: Astromonaxonellida, Sigmatomonaxonellida.
Class 4. Euceratosa.
Order: Euceratosa.
Branch b. Enterozoa.
Grade 1. Enterocoela (see Coelentera).
Phylum 2. Hydromedusae or Hydrozoa (q.v.).
Class. Hydromedusae, (q.v.).
Orders: Eleutheroblastea, Hydroidae seu Leptolinae (Sub-orders: Anthomedusae, Leptomedusae), Hydrocorallinae, Graptolitoidea Trachylinae (Sub-orders: Trachomedusae, Narcomedusae), Siphonophora.
Phylum 3. Scyphomedusae (q.v.).
Class. Scyphomedusae.
Orders: Cubomedusae, Stauromedusae, Coronata, Discophora.
Phylum 4. Anthozoa (q.v.).
Class. Anthozoa.
Sub-class 1. Alcyonaria.
Orders: Stolonifera, Alcyonacea, Pseudaxonia, Axifera, Stelechotokea, Coenothecalia.
Sub-class 2. Zoantharia.
Orders: Zoanthidea, Cereanthidea, Antipathidea, Actiniidea (Sub-orders: Malacactiniae and Scleractiniae or Madreporia).
Phylum 5. Ctenophora.
Class. Ctenophora.
Sub-class 1. Tentaculata.
Orders: Cydippidea, Lobata, Cestoidea.
Sub-class 2. Nuda.
No Orders.

Grade 2. Coelomocoela.

Phylum 6. Platyelmia (q.v.).
Class 1. Planaria (see Planarians).
Order: Turbellaria.
Class 2. Temnocephaloidea (see appendix to Planarians).
No Orders.
Class 3. Trematoda (see Trematodes).
Orders: Heterocotylea, Aspidocotylea, Malacocotylea.
Class 4. Cestoda (see Tapeworms).
Orders: Monozoa, Merozoa.
Phylum 7. Nematoidea.
Class 1. Nematoda (see Nematode).
No Orders.
Class 2. Chaetosomidae (see Chaetosomatida).
No Orders.
Class 3. Desmoscolecida (q.v.).
No Orders.
Class 4. Nematomorpha (q.v.).
No Orders.
Phylum 8. Chaetognatha (q.v.).
No Orders.
Phylum 9. Nemertina.
Class. Nemertina (q.v.).
Orders: Protonemertini, Mesonemertini, Metanemertini, Heteronemertini.
Phylum 10. Mollusca (q.v.).

Grade A. Isopleura.

Class 1. Amphineura (see Chiton).
Orders: Polyplacophora, Aplacophora.

Grade B. Prorhipidoglossomorpha.

Class 2. Gastropoda (q.v.).
Sub-class 1. Streptoneura.
Orders: Aspidobranchia, Pectinibranchia.
Sub-class 2. Euthyneura.
Orders: Opisthobranchia, Pulmonata.
Class 3. Scaphopoda (q.v.).
No Orders.
Class 4. Lamellibranchia (q.v.).
Orders: Protobranchia, Filibranchia, Eulamellibranchia, Septibranchia.

Grade C. Siphonopoda.

Class 5. Cephalopoda (q.v.).
Orders: Tetrabranchia, Dibranchia.
Phylum 11. Appendiculata.
Sub-phylum 1. Rotifera (q.v.).
Class. Rotifera.
Orders: Aspianchnaceae, Melicerlaceae, Trochosphaeraceae, Ploimoidaceae, Bdelloidaceae, Floscularaceae, Ploima, Seisonaceae.
Sub-phylum 2. Chaetopoda (q.v.).
Class 1. Polychaeta.
Orders: Nereidiformia, Cryptocephala, Capitelliformia, Terebeliiformia, Spioniformia, Scoleciformia.
Class 2. Oligochaeta.
Orders: Aphaneura, Limicolae, Moniligasires, Terricolae.
Class 3. Hirudinae (see Leech).
Orders: Rhynchobdellidae, Gnathobdellidae, Acanthobdellidae.
Class 4. Myzostomida (q.v.).
No Orders.
Class 5. Saccocirrida.
No Orders.
Class 6. Haplodrili (q.v.).
No Orders.
Class 7. Echiuroidea (q.v.).
No Orders.
Sub-phylum 3. Arthropoda (q.v.).
Grade 1. Ceratophora.
Class 1. Peripatidea (see Peripatus).
No Orders.
Class 2. Chilopoda (see Centipede).
Sub-class 1. Pleurostigma.
Orders: Geophilomorpha, Scolopendromorpha, Craterostigmomorpha, Lithobiomorpha.
Sub-class 2. Notostigma.
Order: Scutigeromorpha.
Class 3. Diplopoda (see Millipede).
Sub-class 1. Pselaphognatha.
Order: Penicillata.
Sub-class 2. Chilognatha.
Orders: Oniscomorpha, Limacomorpha, Colobognatha, Ascospermophora, Proterospermophora, Merochaeta, Opisthospermophora.
Class 3. Pauropoda (see Millipede).
No Orders.
Class 4. Symphyla (see Millipede).
No Orders.
Class 5. Hexapoda (q.v.).
Sub-class 1. Apterygota.
Order: Aptera.
Sub-class 2. Exopterygota.
Orders: Dermaptera, Orthoptera, Plecoptera, Isoptera, Corrodentia, Ephemoptera, Odonata, Thysanoptera, Hemiptera, Anoplura.
Sub-class 3. Endopterygota.
Orders: Neuroptera, Coleoptera, Mecaptera, Trichoptera, Lepidoptera, Diptera, Siphonaptera, Hymenoptera.
Grade 2. Acerata.
Class 1. Crustacea (q.v.).
Sub-class 1. Entomostraca (q.v.).
Orders: Branchiopoda (Sub-orders: Phyllopoda, Cladocera, Branchiura), Ostracoda, Copepoda.
Sub-class 2. Thyrostraca (q.v.) = (Cirripedia).
No Orders.
Sub-class 3. Leptostraca.
No Orders.
Sub-class 4. Malacostraca (q.v.).
Orders: Decapoda (Sub-orders: Brachyura, Macrura), Schizopoda (including Anaspides), Stomatopoda, Sympoda (Cumacea), Isopoda (including Tanaidacea), Amphipoda.
Class 2. Arachnida (q.v.).
Grade A. Trilobitae (see Trilobite).
(Orders not determined.)
Grade B. Nomomeristica.
Sub-class 1. Pantopoda.
Orders: Nymphonomorpha, Ascorhynchomorpha, Pycnogonomorpha.
Sub-class 2. Eu-Arachna.
Grade a. Delobrancha (or Hydropneusta).
Orders: Xiphosura, Gigantostraca.