Page:Encyclopædia Britannica, Ninth Edition, v. 24.djvu/862

Rh 812 ZOOLOGY kester. even in Haeckel and Gegenbaur may be considered as finally expunged. Classifi- We give below the classification of Ray Lankester as cation of a n example of the most recent genealogical classification. RayLau- j t ^ g re p resen ted by the above genealogical tree and the tabular statement which follows. The chief points in this classification are the inclusion of Balanoglossiis and the Tunicata in the phylum Vertebrata, the association of the Rotifera and the Chsetopoda with the Arthropoda in the phylum Appendiculata, the inclusion of Limulus and the Eurypterina in the class Arachnida, and the total aban doning of the indefinite and indefensible group of &quot;Vermes.&quot; Grade A. PLASTIDOZOA (PROTOZOA}. Grade a. GYMNOMYXA. Class I. PROTEOMORPHA (no orders recognized). ,, II. MYCETOZOA. Orders.!. Sorophora. 2. Endosporea. 3. Exosporca. ,, III. LOBOSA. Orders. 1. Nuda. 2. Tcstacea. ,, IV. LABYRINTHULIDEA (no orders). ,, V. HELIOZOA. Orders. 1. Aphrothoraca, 2. Ohlamydophora. 3. Chalarothoraca. 4. Dcsmothoraca. ,, VI. RETICULARIA. Sub-Class a. Imperforata. Orders. 1. Gromiidea. 2. Astrorhizidca. 3. Hilio- lidea. 4. Lituolidca. Sub-Class b. Perforate/,. Orders. 1. Textularidea. 2. Chilostomcllidea. 3. Lagenidea. 4. Globigerinidca. 5. Rotcdidca. 6. Nummulinidca. ,, VII. RADIOLARIA. Sub-Class a. Silicoskcleta. Orders. 1. Pcripyl&a. 2. Monopylssa. 3. Phieodaria. Sub-Class b. AcanthinosJceleta. Order. 1. Acanthometridca. Grade J. CORTICATA. Class I. SPOROZOA. Sub -Class a. Gregarinidea. Orders. 1. Haplocyta. 2. Scptnta. Sub-Class b. Coccidiidea. Orders. 1. Monosporea. 2. Oligosporea. 3. Poly- sporea. Sub-Class c. Myxosporidea (no orders). ,, d. Sarcocystidea (no orders). ,, II. FLAGELLATA. Sub-Class a. Lissoflagcllata. Orders. 1. Monadidea. 2. Euglenoidea. 3. Hetero- inastigoda. 4. Isomasiigoda. Sub-Class b. Choanoflagcllata. Orders. 1. Nuda, 2. Loricata. 3. Gclatinigera. ,, III. DlNOFLAGELLATA. Orders. 1. Adinida. 2. Dinifcra. ,, IV. RHYNCHOFLAGELLATA (no orders). ,, V. ClLIATA. Orders. 1. Peritrichct. 2. Heterotricha. 3. Holo- tricJia. 4. Hypotricha. ,, VI. ACINETARIA. Orders. 1. Siwtoria. 2. Non-Suctoria. Grade B. ENTEROZOA. Sub-Grade A. CCELENTERA. Phylum 1. NEMATOPHORA. Class I. HYDRO-MEDUSA. Orders. 1. Aniliomedusse (Gymnoblastcea). 2. Lep- tomedusae, (Ccdyptoblostcea). 3. Narcomedusas. 4. Trochomedusae. 5. Hydrocomllinas. 6. SipJiono- phora. ,, II. SCYPIIOMEDUS^E. Sub -Class a. Tetrameralia. Orders. l.Calycozoa. 2. Peromedusse. S.Cubomedusse. Sub-Class b. Octomeralia. Orders. 1. Cannostomx. 2. Scmostomas. 3. Ehizostomas. ,, III. ANTHOZOA. Sub-Class a. Actiniomorpha. Orders. 1. Adiniaria. 2. Antipatharia, 3. Madre- poraria. Sub-Class b. Alcyoniomorpha. Orders. 1. Protalcyonaria. 2. Stolonifcra. 3. Al- cyonaria. 4. Paragorgonaria. 5. Gorgonaria. 6. Pennatularia. 1. Hclioporaria. Class IV. CTENOPHORA. Orders. 1. Saccata. 2. Eurystoma. 3. Tseniata. 4. Lobata. Phylum 2. PORIFERA. Class I. CALCISPONGI.E ( = Mcgamastictora). Orders. 1. Homoccela. 2. Hetcroccela. ,, II. SiLicosi OXGi^E ( = Micromastictora). Sub-Class 1. Hyalospongiee. Order. Hexactinellaria. Sub-Class 2. Dcmospongise. Orders. 1. Tctradincllaria. 2. Monaxonaria. 3. Halisarcaria. Sub-Grade B. CCELOMATA. Phylum 1. VERTEBRATA. Branch A. Hemichorda (Salanoglossus). ,, B. Urochorda. Grade I. Larvalia (no divisions recognized). ,, II. Saccata. Class I. ASCIDI^E. Orders. 1. Simplices. 2. Socialcs. 3. Composite. 4. Pyrosomiidca. ,, II. SALPIFORMIA. Orders. 1. Salpiidca. 2. Doliolidca. Branch C. Cephaloctiorda (Ampliioxus). ,, D. Craniata. Grade I. Cyclostoma. Class I. MYXJNOIDEA (no orders). ,, II. PETROMYZONTIA (no orders). Grade II. Gnathostoma. Sub-Grade a. Branchiata Heterodactyla. Class I. PISCES. Sub-Class 1. Sclachii. Orders. 1. Squali. 2. Rail. Sub-Class 2. Holocephali (no orders). ,, 3. Ganoidci. Orders. 1. Chondrostci. 2. Polypterini. 3. Lepi- dosteini. 4. Amidini. 5. Ceplialaspidini. 6. Pla- codermi. 7. Acanthodini. 8. Pycnodontini. 9. Gcelacanthini. 10. Diptcrini. Sub-Class 4. Teleostci. Orders. 1. Physostomi. 2. Pliaryngognatlii. 3. Anacanthini. 4. Acanthoptcri. 5. PlectognatM. 6. LophobratuMa. ,, II. DIPNOI. Orders. 1. Monopncumoncs. 2. Dipncumoncs. Sub-Grade b. Branchiata Pentadactyla. Class I. AMPHIBIA. Sub-Class 1. Urodcla. Orders. 1. Ichthyoidca. 2. Salamandrina. Sub-Class 2. Gymnophiona (Ccedlia, &c. ). ,, 3. Stegoccphala (Labyrinthodon, &c. ). ,, 4. Anura (Rana, &c.). Sub-Grade c. Lipobranchia Pentadactyla. Branch a. MONOCOKDYLA. Class I. REPTILIA. Sub-Class 1. Chelonia (orders not tabulated). ,, 2. Laccrtilia. Orders. 1. Rhynchoccphala. 2. Chamseleonina. 3. Lacertina. Sub-Class 3. Ophidia. Orders.!. Opotcrodonta. 2. Colubriformia. 3. Protcrogh/pha. 4. SolcnoglypJia. Sub-Class 4. Crocodilia. Orders. 1. Amphiccelia. 2. Opisthoccelia. 3. Proccelia. Sub-Class 5. Pterosauria (orders not tabulated). ,, 6. Dinosauria. Orders. 1. Sauropoda. 2. Stcgosauria. 3. Ornitho2wda. 4. Thcriopoda. 5. Cceluria. 6. CompKognatha. 7. Hallopoda. Sub-Class 7. Anomodontia (Dieynodon, &c. ). ,, 8. Plcsiosauria. ,, 9. Icthyosauria. ,, II. AVES. Grade a. Phanerodactyla. Order. Saururte. Grade b. Cryptodactyla. Orders. 1. Ratitw. 2. Cariiiatse. Branch b. AMPHICONDYLA. Class. MAMMALIA. Grade 1. Monotrema (Ornitliorliynchus and Ech idna).