Page:EB1911 - Volume 28.djvu/1061

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.