432 
THE VOYAGE OE H.M.S. CHALLENGER. 
ee. . 
Ectoderm. 
ov. . 
Ovary. 
em.y emh. 
Young buds. 
p. . 
Papniae on the internal longitudinal bars 
era. , 
Endostyle. 
p'. . 
Small intermediate papillae. 
era.c. 
Endocarp. 
p.ab.,p.abd. 
Post-abdomen of Ascidiozooid. 
end. 
Endoderm. 
p.hr. 
Peribranchial cavity. 
ep. . 
Epithelium. 
p.c. 
Pigment corpuscle. 
f.d.. . 
Fold in wall of stomach. 
ped. 
Peduncle. 
f.p.. 
Foreign particle in test. 
ped.c. 
Cavity in the peduncle. 
g. . 
Hermaphrodite genital mass. 
ped.v. 
Blood-vessel in the peduncle. 
g.d. 
Genital ducts. 
pig. 
Mass of pigment cells. 
gin. 
Subneural gland. 
p.p. 
Peripharyngeal band. 
gm, gm'. . 
Gemmse. 
r. . 
Rectum. 
h. . 
Heart. 
sg . . 
Stigmata. 
h.m. 
Horizontal membrane of branchial sac. 
sg.c. 
Stigmatic or cUiated cells. 
h.t. . 
Hepatic (1) tubules. 
sp., sp'. . 
Spicules. 
i, i'. 
Intestine. 
spli. 
Sphincter muscle. 
i.l . 
Internal longitudinal bars of branchial sac. 
st. . 
Stomach. 
inf. 
Infundibulum. 
t. . 
Test. 
1 . 
Languet. 
t.c., t.c. . 
Small cells in the test. 
Is. . 
Lower surface of colony. 
t.e. . 
Terminal enlargement of a blood-vessel. 
Iv. . 
Fine longitudinal vessels. 
t.f . . 
Fibres in test. 
m. . 
Mantle. 
th. . 
Thorax of Ascidiozooid. 
m.b. 
Muscle bands. 
t.h . 
Terminal knob on vessels. 
mes. 
Mesoderm. 
t.m. 
Matrix of test. 
m.f. 
Muscle fibres. 
tn, tn'. 
Large and small tentacles. 
mh. 
Meshes of branchial sac. 
tr, tr'. 
Large and small transverse vessels. 
mh.n. 
Narrow mesh. 
t.v. . 
Spermatic vesicle. 
mh.w. 
Wide mesh. 
ty. . 
Typhlosole. 
n.g. 
Nerve ganglion. 
u.s. . 
Upper surface of colony. 
n.gl 
Subneural gland. 
V. . 
Blood-vessel in test. 
n.p. 
Incubatory pouch. 
v.ap. 
Vascular appendage. 
n.t. 
Neural tube. 
v.ap'. 
Rudimentary vascular appendage. 
0. . 
Mature ovum. 
v.ap.c. 
Canal of vascular appendage. 
o'. . 
A young ovum. 
v.d. 
Vas deferens. 
o.d. 
Oviduct. 
ves. 
Vesicle of intestinal gland. 
oe . 
(Esophagus. 
z. 
Prebranchial zone. 
For ly 2, 3, and other special symbols see the explanations of the separate plates. 
