74 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
mu. r. hue. 
Radial muscles of buccal 
pa. gen. 
Genital papilla. 
region. 
par. oa. 
Wall of the ovary. 
mu. r. v. 
Median-ventral radial 
sep. 
Connective-tissue parti. 
muscle. 
tion. 
mu. ta. 
Muscle layer of tentacles # 
sng. r. 
Radial blood sinus. 
mu. tr. 
Transverse muscles of 
sng. ta. 
Tentacular blood sinus. 
the body-wall. 
sp'cy. 
Spermatocyte. 
n. 
Nervous tissue. 
sp'd. 
Spermatid. 
n. buc. 
Buccal nerve. 
sp'go. 
Spermatogonium. 
n. con. 
Conical buccal nerve 
split, buc. 
Buccal sphincter. 
(abnormality.). 
sul. 
Furrow upon the surface 
nl. 
Nucleus. 
of the nerve ring. 
nl f. 
Remnant of nucleus in 
tbl. mu. 
Tubules composed of 
a degenerating ovum. 
muscle fibers. 
nl. vt. 
Yolk nucleus. 
tis. can't. 
Connective tissue. 
n. r. dx-d. 
Right-dorsal radial 
tis. can't, ex. 
. External layer of con¬ 
nerve. 
nective tissue in wall 
n. r. ex. 
External band of the 
of respiratory tree. 
radial nerve. 
tis. con't. i. 
Internal layer of same. 
n. r. i. ■ 
Internal band of the 
v a. sng. 
Antimesenterial blood 
radial nerve. 
vessel of the small in¬ 
n. ta. 
Nerve to tentacle. 
testine. 
o. rsp. dx. 
Right branch of respira¬ 
vs. Pol. 
Polian vesicle. 
tory tree. 
vt. ex. 
External layer of yolk, 
o. rsp. s-d. 
Left-dorsal branch of 
separated by an intra¬ 
respiratory tree. 
vitelline membrane 
o. rsp. s-v. 
Left-ventral branch of 
from 
respiratory tree. 
vt. i. 
Internal layer of yolk. 
pa. an. 
Anal papilla. 
z. r. 
Zona radiata. 
