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GRADE A

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Originally appearing in Volume V28, Page 1034 of the 1911 Encyclopedia Britannica.
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GRADE A . See also:

Protozoa (various See also:groups included). GRADE B. Metazoa. See also:Branch a. Parazoa. Phylum I. PORIFERA.Branch b. Enterozoa. Grade I. ENTEROCOELA. Phylum 2.

See also:

HYDROMEDUSAE. 3. See also:SCYPHOMEDUSAE. 4. See also:ANTHOZOA. 5. CTENOPHOFA. Grade 2. COELOMOCOELA. Phylum 6. See also:PLATYELMIA. 7.

NEMATOIDEA. 8. See also:

CHAETOGNATHA 9. See also:NEMERTINA. I0. See also:MOLLUSCA. II. See also:APPENDICULATA. Sub-phyla: See also:ROTIFERA, See also:CHAETOPODA, See also:ARTHROPODA. I2. See also:ECHINODERMA. 13.

See also:

VERTEBRATA. Sub-phyla: See also:HEMICHORDA, UROCHORDA, CEPHALOCHORDA, CRANIATA. 14. See also:MESOZOA. 15. See also:POLYZOA. 16. See also:ACANTHOCEPHALA 17. PODAXONIA. 18. GASTROTRICIIA. A statement may now be given of the classes and orders in each See also:group, as recognized by the writers of the various See also:special zoological articles in the See also:Eleventh &am)-a Edition of the See also:Encyclopaedia Britannica.

These sub- adopted divisions of the larger groups are not necessarily in the those theoretically approved by the See also:

present writer, pwresentk.r o but they have the valuable See also:sanction of the individual experts who have given special See also:attention to different portions of the vast See also:field represented by the See also:animal See also:kingdom.' GRADE A. Protozoa (q.v.). Phylum I. See also:Sarcodina (q.v.). Class I. PROTEOMYXA (q.V.) Class 2. See also:RHIZOPODA (q.V.). Orders: Lobosa, See also:Filosa. Class 3. See also:HELIOZOA (q.v.). Class 4. See also:FORAMINIFERA (q.v.).

Orders: Nuda, Allogromidiaceae, Astrorhizidiaceae, Lituolidaceae, Miliolidaceae, Textulidaridaceae, Cheilostomellaceae, Lagenidaceae, Globigerinidaceae, Rotalidaceae, Nummulidiaceae. Insertae sedis. Xenophyophoridae (see FORAMINI- FERA). Class 5. See also:

RADIOLARIA. Orders: Spumellaria (=Peripylaea), Acantharia (= Actipylaea), Nasselaria (= Monopylaea), Phaeodaria (~ Tripylaea). Class 6. See also:LABYRINTHULIDEA (q.v.). No Orders. Class 7. MYXOMYCETES. No Orders.

Phylum 2. See also:

Mastigophora (q.v.). Class I. See also:FLAGELLATA (q.v.). Sub-class A. Rhizoflagellata. Orders: Holomastigaceae, Rhizomastigaceae. Sub-class B. Euflagellata. Orders: Protomastigaceae, Chrysomonadaceae, Crvptomonadaceae, Chloromonadaceae, Euglenaceae, Volvocaceae. Class 2. See also:DINOFLAGELLATA.

Orders: Gymnodiniaceae, Prorocentraceae, Peridiniaceae. Class 3. See also:

CYSTOFLAGELLATA. No Orders. Phylum 3. See also:Sporozoa (q.v.). Class I. See also:ENDOSPORA (q.v.). Orders: Myxosporidia, Actinomyxidia, Sarcosporidia, Haplosporidia. Class 2. See also:ECTOSPORA (q.v ). Orders: Gregarina (see See also:GREGARINES), See also:Coccidia (q.v.), See also:Haemosporidia (q.v.).

Phylum 4. See also:

Infusoria (q.v.). Class I. See also:CILIATA. Orders: Gymonostomaceae, Trichostomata, See also:Aspirotrichaceae, Spirotricha, Heterotrichaceae, Oligotrichaceae, Hypotrichaceae, Peritrichaceae. Class 2. SUCTORIA. No orders. ' It is to be noted that the terms used for designating categories in the See also:classification are not always identical in this See also:summary and See also:separate articles, as authors differ as to the use of these. 1.. d W Q~~~ el~~ns qri Q~d` \ 1 ' / ~eF 5,4",, 1034.

End of Article: GRADE A

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