Pachycerianthus torreyi n. sp.— A rai 
213 
Grenzstreifen (Carlgren, 19243:347)- — -mesen- 
teret (q.v.). 
Hampe (Faurot, 1895:50)- — main portion of 
mesentery excluding mesenterial filament. 
Hampe (Weill, 1934:26)— shaft of nemato- 
cyst (q.v.) . 
Hemisulcus (Beneden, 1897:37-38; Carlgren, 
1912^:50, 63)— continuation of half hypo- 
sulcus along edge of a directive mesentery. 
Holotfich (Weill, 1930:145; 1934:37-38, 49- 
50, 64, 624-626; Cuttress, 1955:134-137) — 
basophilic nematocyst with an isodiametric, 
open-ended, tube armed along its entire 
length. 
Hoplotelic terminal tube (Weill, 1930:147; 
1934: 38) —terminal tube bearing spines. 
Hyposulcm (Beneden, 1897:15, 37-38; Carl- 
gren, 1912^:50, 63)— grooved structure con- 
necting the directive mesenteries, continua- 
tion of the siphonoglyph below the border 
of the actinopharynx. 
Inter mesenterial chamber (Faurot, 1895:228) 
—portion of coelenteron between two adja- 
cent mesenteries. 
Isorhize (Weill, 1930:145; 1934:37, 49, 624) 
— nematocyst with isodiametric tube open 
at tip. 
/ (Beneden, 1923:23)— loge de multipication, 
i.e. multiplication chamber. 
L (Beneden, 1897: 10)— loge, i.e. intermesen- 
terial chamber, other than directive chamber. 
L (Beneden, 1923:23)- — loge directrice, i.e. di- 
rective chamber. 
L with superscript (Beneden, 1923:23) — loge 
other than directive chamber. 
Labial tentacle i Haime, 1854: 368-369)— tenta- 
cle of one of cycles surrounding mouth (cf. 
marginal tentacle). 
Lame ( Haime, 1854:371, 374) — mesentery 
(q. v.). 
Loge (Haime, 1854:371 )— intermesenterial 
chamber (q.v.). 
m (McMurrich, 1910: 14-15) —shorter mac- 
rocneme, i.e. macroseptum, of metamesenter- 
ial quartette. 
m (Beneden, 1897: 113)— multipication cham- 
ber (q.v.). 
M (McMurrich, 1910: 14-15) —longer mac- 
rocneme, i.e. macroseptum, of metamesenter- 
ial quartette. 
M (Beneden, 1897:10) — loge directrice, i.e. 
directive chamber (q.v.). 
Macro basic mastigop bore (Weill, 1934:38,64- 
68; Cuttress, 1955:133-134) — mastigophore 
in which shaft is more than three times cap- 
sule length. 
Macrobimesenterium ( Carlgren, 1912^:51) — 
macrobiseptum (q.v.). 
Macrobiseptum (Beneden, 1897:23-24) — two 
longest mesenteries of a metamesenterial 
quartette. 
Macrocneme (Stephenson, 1920:456)— mesen- 
tery of Actiniaria attached to actinopharynx 
with strong retractors, gonads, and filaments. 
Macrocneme (McMurrich, 1910:14) macrosep- 
tum of Ceriantharia (q.v.). 
Macro septum (Faurot, 1891:68-69; 1895:233- 
234; Torelli, 1960:374)- — one of two longest 
metamesenteries in a quartette. 
Marginal tentacle (Haime, 1854:363-368) — 
tentacle of one of cycles near edge of oral 
disc (cf. labial tentacle). 
Mastigophore (Weill, 1930:146; 1934:38, 58) 
—nematocyst with well-defined isodiametric 
shaft and terminal tube with open tip. 
Median plane (Beneden, 1897:12) — directive 
plane (q.v.). 
Median streak (Carlgren, 1912^:60-67) — spi- 
rocyst-glandular tract (q.v.). 
Median streak (McMurrich, 1910:20-21) — 
central tract of trineme. 
Median tentacle ( Beneden, 1 897 : 1 0 ) — direc- 
tive tentacle (q.v.). 
Mesenterial length — distance from aboral end 
of actinopharynx to aboral end of mesentery. 
Mesenterialfaden (Hertwig and Hertwig, 1879: 
579-580) — craspedoneme (q.v.). 
Mesenterial filament (Frey and Leuckart, 1847: 
12-18; Hertwig and Hertwig, 1879:556) — 
thickened rim running along free border of 
mesentery from end of actinopharynx abor- 
ally. 
Mesenteret (Beneden, 1897:27; Carlgren, 1931: 
8) — projection of mesentery bearing the 
peloton. 
Mesentery (Frey and Leuckart, 1847 : 11 ; La- 
caze-Duthiers, 1873:301-302; Bourne, 1900: 
8-9)- — longitudinal extension into coelen- 
teron from body wall, attached to actino- 
