212 
of ciliated ectoderm from a ridge of the 
actinopharynx along the length of a mesen- 
terial filament. 
Cnido glandular tract (Carlgren, 1912^:59-66) 
— plectocraspedon ( q. v. ) . 
Cnidom (Weill, 1926:1245; 1934:351 )— ne- 
matocyst complement of coelenterate at any 
given moment of its existence. 
Cnidoneme (Beneden, 1923:154) — acontioid 
(q. v.). 
Cnidorage (Beneden, 1897:32; Carlgren, \9\2a\ 
72-73) — rounded projection of mesentery 
containing numerous nematocysts. 
Coelenteron (Beneden, 1897:14) — main cav- 
ity of the animal. 
Column (Gosse, 1860:2, 268; Beneden, 1897: 
9) — body cylinder below oral disc and tenta- 
cles. 
Column length — internal distance from aboral 
end of actinopharynx to aboral pole. 
Commissural plane (Faurot, 1895:50, 59) — 
directive plane. 
Continuous mesentery (Heider, 1879:216-217; 
McMurrich, 1890: 137 ) — mesentery reaching 
the aboral pore, especially applicable to a 
second protomesentery. 
Cordon pelotonne (Haime, 1854:374) — mes- 
enterial filament {q.v.). 
Couple of mesenteries (Faurot, 1895:103; Ben- 
eden, 1897:20-21; Carlgren, 1906:66) — two 
corresponding mesenteries on opposite sides 
of directive plane. 
Craspedum (Gosse, 1858:125; 1860:xxiii-xxiv, 
5; Bourne, 1919:54-55; Torelli, 1960:374) 
— mesenterial filament {q.v.) . 
Craspedion (Carlgren, 1912^:60-68; Torelli, 
1 960 : 3 7 5-3 7 6 ) — telocraspedon {q.v.). 
Craspedoneme { McMurrich, 1910:1 9-2 2 ) — 
threadlike or flattened, sometimes branched, 
process of the mesogloea and entoderm of 
mesentery over which pass ascending and 
descending limbs of mesenterial filament. 
Crown of tentacles (Haime, 1854:350, 363; 
Faurot, 1895:218, 236—240) — all cycles of 
tentacles grouped around mouth or all cycles 
near edge of oral disc. 
Cycle of mesenteries (Carlgren, 1912^:51) — 
order of mesenteries {q.v.). 
Cycle of tentacles (Haime, 1854:365-367; 
Heider, 1879:213; Faurot, 1891:70-71) — 
PACIFIC SCIENCE, Vol. XIX, April 1965 ! 
ring of tentacles all equidistant from mouth 
or from margin of oral disc. is 
d superscript (Beneden, 1897:10-11) — droit, 
i.e. right with reference to the directive plane 
at the siphonoglyph. 
d superscript (Beneden, 1923:23) — directive. 
D (Beneden, 1897:20) — cloison directrice, i.e. 
directive mesentery {q.v.). 
Deuterocneme (McMurrich, 1910: 6—10 ) — met- 
amesentery {q.v.) 
Directive chamber (Carlgren, 1900:27; 1906: 
66) — Intermesenterial chamber between two 
directive mesenteries. 
Directive mesentery { Hertwig and Hertwig, 
1879:538, 572) — one of couple of mesen- 
teries closest to directive plane at siphono- 
glyph. 
Directive plane (Carlgren, 1906:66) — plane 
symetrically bisecting the animal, running 
through siphonoglyph and point diametri- 
cally opposite as seen in cross-section. 
Directive tentacle (Carlgren, 1900:25, 1906: 
66) — tentacle opening into directive cham- 
ber. 
dm. (Carlgren, 1924^:169) — directive mesen- 
tery {q.v.). 
Dorsal — opposite to ventral {q.v.). 
dt. (Carlgren, 1924^:169) — directive tentacle 
{q. v.). 
Ecthoraeum (Gosse, 1858:126; 1860:xxxi- 
xxxv, 269) — tube of nematocyst {q.v.). 
Enteroid { Lacaze-Duthiers, 1873:302; Faurot, 
1895:50-51, 234-235) —mesenterial fila- 
ment {q.v.). 
Enterostome (Beneden, 1897:14) — opening 
from cavity of actinopharynx into coelenteron. 
Eilamentchen region (Carlgren, 1912^:365) — 
telocraspedon {q.v.). 
Eilamentseptum (Heider, 1879:216; Carlgren, 
1912^:51) — sterile mesentery (not in pres- 
ent use) (cf. Genitalseptum) . 
Fils mesenteriques (Beneden, 1897:33) — cras- 
pedoneme {q.v.). 
g superscript (Beneden, 1897:10-11) — gauche, 
i.e. left with reference to directive plane at 
siphonoglyph. 
Genitalseptum (Heider, 1879:216; Hertwig 
and Hertwig, 1879:580-581)- — fertile mesen- 
tery not reaching to aboral pore (cf. Fila- 
mentseptum ) . 
