See also:

• CHAETOPODA (Gr. xairq, hair, aous, foot)

CHAETOPODA (Gr. xairq, See also:

• HAIR (a word common to Teutonic languages)

hair, aous, See also:

• FOOT

foot)  , a zoological class, including the See also:

• MAJORITY (Fr. majorite; Med. Lat. majoritas; Lat. major, greater)

majority of the See also:

• ANNELIDA

Annelida (q.v.), and indeed, See also:

• SAVE, or SAVA (Ger. Sau; Hungarian Szdva; Lat. Savus)

save for the See also:

• ECHIUROIDEA (Gr: 'xis, adder, and ovpa, tail)

Echiuroidea (q.v.), co-extensive with that See also:

• GROUP

group as usually accepted . They are divisible into the See also:

• HAPLODRILI (so called by Lankester)

Haplodrili (q.v.) or Archiannelida, the See also:

• POLYCHAETA

Polychaeta containing the marine See also:

• WORMS

worms, the See also:

• OLIGOCHAETA

Oligochaeta or terrestrial and fresh-See also:

• WATER

water annelids (see See also:

• EARTHWORM

EARTHWORM), the Hirudinea or leeches (see See also:

• LEECH
• LEECH, JOHN (1817-1864)

LEECH), and a small group of parasitic worms, the See also:

• MYZOSTOMIDA

Myzostomida (q.v.) . The distinctive 'characters of the class See also:

• CHAETOPODA (Gr. xairq, hair, aous, foot)

Chaetopoda as a whole are partly embodied in the name . They possess (save for certain Archiannelida, most Hirudinea, and other very rare exceptions) setae or chaetae implanted in epidermal pits . The setae are implanted metamerically in accordance with the See also:

• METAMERISM (Gr. writ, after, µEpos, a part)

metamerism of the See also:

• BODY

body, which consists of a prostomium followed by a number of segments . The number of segments in an individual is frequently more or less definite . The anterior end of body always shows some " cephalization." The See also:

• INTERNAL

internal See also:

• ORGANS

organs are largely repeated metamerically; in See also:

• CORRESPONDENCE
• CORRESPONDENCE (from med. scholastic Lat. correspondentia, corrcspondere, compounded of Lat. cum, with, and respond ere, to answer; cf. Fr. correspondance)

correspondence with the See also:

• EXTERNAL

external metamerism . Thus the body cavity is divided into a sequence of See also:

• CHAMBERS (the Fr. chambre, from Lat. camera, a room)
• CHAMBERS, EPHRAIM (d. 1740)
• CHAMBERS, GEORGE (1803-1840)
• CHAMBERS, ROBERT (18oz-1871)
• CHAMBERS, SIR WILLIAM (1726-1796)

chambers by transverse septa; and even among the Hirudinea, 790 where this See also:

• CONDITION (Lat. condicio, from condicere, to agree upon, arrange; not connected with conditio, from condere, conditum, to put together)

condition is usually not to be observed, there is embryological See also:

• EVIDENCE (Lat. evidentia, evideri, to appear clearly)

evidence that the existing See also:

• STATE
• STATE, GREAT OFFICERS OF

state of affairs is derived from this . Commonly the nephridia are strictly paired a single pair to each segment, while the branches of the See also:

• BLOOD

blood vascular See also:

• SYSTEM

system are similarly metameric . The alimentary See also:

• CANAL
• CANAL (from Lat. canalis, " channel " and " kennel " being doublets of the word)

canal is nearly always a straight See also:

• TUBE (Lat. tuba)

tube See also:

• RUNNING

running from the mouth, which is surrounded by the first segment of the body and overhung by the prostomium, to the anus,which is then either surrounded by the last segment of the body or opens dorsally a little way in front of this .