Pachycerianthus torreyi n. sp.- — A rai 
211 
lg superscript (Beneden, 1897: 10—11 ) — first 
structure to left with reference to directive 
plane at siphonoglyph. 
a superscript (Beneden, 1 92 3:23) — belonging 
to second somatomere of the prosome 
Acontioid (Pax, 1914:394)— long threadlike, 
simple or slightly branched craspedoneme, 
rounded in cross section, with many mucous 
cells and reduced endoderm, at or near aboral 
end of mesenterial filament. 
Acontium (Gosse, 1858:125; 1860:xxiii-xxv, 
5; Hertwig and Hertwig, 1879: 562-565; 
Torelli, 1960:376-379) — thin threadlike 
structure of Actiniaria containing numerous 
nematocysts, attached at one end to a mesen- 
tery, usually below the filament. 
Acontium (Beneden, 1897:30-33; Bourne, 
1919:60-61; Carlgren, 1912^:42, 68-72) — 
acontioid ( q. v. ) . 
Acontium (Heider, 1879:217)— craspedoneme 
{q.v.). 
Acromere (Beneden, 1923:22 )— "segment” of 
body, including the directive chamber, di- 
rective mesenteries and directive tentacles 
(by analogy to Amphioxus ) . 
Actinocoel (Bourne, 1919:35 ) — -intermesente- 
rial chamber {q.v.). 
Actinopharynx ( Beneden, 1897 : 13-14 ) —tube 
leading from mouth into codenteron, lined 
by longitudinally ridged, invaginated, ecto- 
derm which is supported by mesogloea. 
Actinostome (Beneden, 1897:9-10, 13—14 ) — 
mouth ( q.v .). 
Animal length— external distance from base of 
marginal tentacles to aboral pore. 
Armature (Weill, 1930:147; 1934:21-22) — 
spines on tube of nematocyst. 
Atrich (Weill, 1930:146; 1934:37, 50-52, 
624-626)— nematocyst with isodiametric, 
unarmed, tube open at tip. 
Axenteron (Beneden, 1897:20)— central por- 
tion of coelenteron undivided by mesenteries. 
Axial body (Moebius, 1866:387; Weill, 1934: 
22-24) — straight basal section of nemato- 
cyst tube within the capsule. 
b (McMurrich, 1910: 14-15)— shorter brachy- 
neme, Le. microseptum, of a metamesenterial 
quartette. 
B (McMurrich, 1910: 14—15)— -longer brachy- 
neme, i.e. microseptum, of a metamesenterial 
quartette. 
Biseptum (Beneden, 1897:23) — two longest or 
two shortest mesenteries of a metamesente- 
rial quartette. 
b-mastigophore ( Carlgren, 1940 : 3-4 ) — mas- 
tigophore with shaft tapering gradually to 
terminal tube. 
Botrucnid (Beneden, 1897:32; Carlgren, 1912^: 
72-7 4 ) —stalked bunch of cnidorages {q.v .) . 
Brachyneme (McMurrich, 1910:14) — micro- 
septum {q.v.) . 
Buccal cone (Beneden, 1897:9) — raised por- 
tion of oral disc immediately surrounding 
mouth of some larval forms. 
Buccal disc (Vogt, 1888:29) — -oral disc {q.v.). 
Buccal tentacle (Vogt, 1888:9-10)— labial ten- 
tacle {q.v.). 
Capsule (Weill, 1934:21, 27-30)— hollow case 
of nematocyst. 
Cerinula (Beneden, 1897:147; 1923:19) — lar- 
val stage with at least three couples of mesen- 
teries. 
Ciliated tract (Hertwig and Hertwig, 1879: 
557)— continuation of ciliated ectoderm and 
mesogloea from a furrow of the actinophar- 
ynx along one side of a mesenterial filament. 
Ciliated tract region (Carlgren, 1912*: 59-60) 
— trineme {q.v.). 
Cloison (Fisher, 1887:383; Faurot, 1895:50) 
—mesentery {q.v.). 
Cloison prequatroseptale (Beneden, 1897:24) 
— protomesentery {q.v.) . 
Cloison primitive (Beneden, 1897:23)-— one 
of second couple of protomesenteries. 
Cloison quatroseptale (Beneden, 1897:24) — 
metamesentery {q.v.). 
Cnida (Gosse, 1858:125; 1860:xxii, xxix-xxxiv^ 
269; Weill, 1934:330)— nematocyst sensu 
Haime {q.v.). 
Cnida cochleata (Gosse, 1858:126-127; 1860: 
xxxiii-xxxiv; Bedot, 1896:534; Weill, 1930: 
149 ) — spirocyst {q.v.). 
Cnida glomifef'a (Gosse, 1858:126; 1860:xxxii- 
xxxiii; Weill, 1934:89-90) — nematocyst 
with nearly oval capsule containing long, iso- 
diametric, loosely coiled tube ( not in present 
use). 
Cnido glandular tract (Hertwig and Hertwig, 
1879:557; Carlgren, 1949:8) — continuation 
