Class 2. PH ORON1DA. Worm-like polyzoans, living in associations of individu als lanai from ova. not by buds.
Class 3. Ibu•uunama. Polyzoa with the body inAased in a shell of two valves; body usually attached by a stalk (Lamp-Shells).
Phylum VEIT. EcniNonEamava .(Eehino dernts). of prevailingly radical strum tm.e, with intestinal wall distinct from body-wall, and with calcareous plates in Ihe skin.
Class 1. STURM DEA . Sta r-sha ped echino derms. with a furrow (ambula claim) along the under side of the arms (Starfish).
Class 2. Oialiramn•a. Star-shaped echino derms. with the arms sharply marked off from the body, and not grooved ( Brittle Stars).
Class 3. ECII I NOIDEA. Echinoderuls With the body globular or disk-shaped. and armless (Sea-rr•hins).
Class 4. 1101.0TIIUROIDEA. Echinoderms elongated. wormlike. usually soft, and with tentacles about the mouth (Trepangs).
Class 5. CRINOIDEA. Sessile, and having a cup-shaped body (Crinoids). Class G. CysrolDEA. Globular, sessile, or stalked Class 7. ItLASTOIDEA. Ovate, Stalked (Fos sil).
Phylum IX. A NNULATA. ( Worms). Bilateral segmented worms without jointed legs.
Class I. CILETOPODA. \\ onus made up of a series of metameres, each bear ing parapodia and cirri (Anne lids).
Subclass 1. l'olyeluria. Sexes distinct; ovaries and testes simple and met americally repeated (Marine An nel ids ) .
Subclass 2. filigochata. Sexes united; ovaries and testes few and com pact (Terrestrial and fresh water).
Class 2. 7.‘lYzosTommA. Disk-shaped. un segmented ( Parasites of Crin oids).
Class 3. GEPHYREA. Sessile annelids, with out external segmentation in the adult ( Marine ) .
Class 4. ARCIII-ANNELIDA. Minute marine annelids, faintly segmented, often parasitic.
Class 5. Flint:DINEA. Annelids with short rings or none at all, and with ventral suckers (Leeches).
Phylum X. ARTHROPODA ( used s, Crusta ceans. etc). Symmetrical segmented animals, with jointed appendages.
Class 1. CRUSTACEA. Typically aquatic and gill-bearing; usually two pairs of antenna: (Crustaceans).
Subclass 1. Entomostraert.
and with a varied number of ap pendages (Water-Fleas. etc.).
Subclass 2. _11 alacost raca. Crnstacea with nineteen pairs of appendages (Crabs, Crayfish, etc.).
Class 2. TRII.ORITA. Body depressed, oval, and divided into head, thorax. and abdomen (Extinct Trilobites).
Class 3. ONYCHOPHORA.. Cylindrical, un . seg,menteu, papillose, and with a series of short walking append ages (Peripatus).
Class 4. MYRIAPODA. Tracheate arthropods, consisting of several segments, each bearing one or two pairs of legs (('entipedes and Millipedes).
Class 5. INSECTA. Arthropods with the body in three divisions—head. thorax, and abdomen—with six thoracic legs. and usually with wings (Insects).
Class G. ARACIINIDA. Air-breathing ar thropods, without antenna. (Spi ders, Scorpions, etc.).
Phylum XI. ( Mollusks) . Animals with unsegmented holy, and without jointed appendages; usually with a shell. and with a muscular organ of locomotion (the foot ).
Class 1. l'ELLCIPODA. with a. nearly Ludy, leaf like gills. and a two-vaked shell ( Him a ves Class 2. AMP II I N EtitA. Bilaterally sym metrical; anus at enil of holy Chiton_s).
Class 3. GAsTnocon.k. Body unsymmetrical,. Ni it h head, feelers., eyes, and un paired foot ; shell (when present) univalve (tlastropods).
Subclass I. ryptoneara. Visceral missures twisted into a figure of-s ; sexes dist i net (Limpets, Whelks, etc.).
Subclass 2. E.0 hyne a ra. Visceral coin missures not twisted into a tig ure-of.!-;; sexes united nate,. Nudibranchs, etc.).
Class 4. ScAnnoeonA. llead rudimentary ; mouth-lobes formed into a tul;e, inclosing the delicate shell (Ma rine).
Subclass 1. Sea phopodu. Asabove (Tusk Shells).
Subclass 2. Rhodope. Minute, ciliated; no shell.
Class 5. CEMIALOPODA. Head large; mouth surrounded by arms; foot funnel shaped (Cuttlefish).
Subclass 1. D lb ra ach iata. Two symmet rical branchhe; funnel tubular (Squids and Octopods).
Subclass 2. Tel rabranch ia la. Four bran ebbe; shell mnItilocular (Nand Ins and Ammonites).
Phylum XII. CIIORDATA ( Chordates) . Ani mals having a notochord, which may (Subphy lum C) persist from birth, and become "in the adult replaced more or less completely by a seg mented bony or cartilaginous axis—the spinal or vertebral column." Subphylum and Class A. ADELOCHORDA. Marine worm-like animals, hav ing a notochord as larvx (Balano glossus, ete.).
Subphylum and Class B. FROCHORDA. Animals, simple or minimum], • marine, inclosed in a coriaccous test, composed largely of cellu lose. and having a notochord when Larva. 1 Aseidians).
Subphylum C. VERTEIM ‘TA. Animals bi laterally svmmetrieal, and hav ing a backbone (Vertebrates).