276 Amoehotaenia sphenoides 
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p. 49. 
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Ransom, B. H. (1909). Taenioid Cestodes of North American Birds. Smithsonian 
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DESCRIPTION OF PLATES XX AND XXI. 
The following letters apply to all the figures 
a. Axis of rostellum. 
a. r.c. Anterior ring commissure. 
b. “ Brain.” 
c. Cirrus. 
c.h. Cuticle of head of rosteUum. 
c.m. Circular muscles. 
c.r. Rostellar sheath. 
c. s. Cirrus sac. 
d. l.c. Dorsal longitudinal canal. 
d'.r.c'. Ventral longitudinal canal. 
d.c. Dome-shaped chamber. 
g.s Genital sinus. 
l.c. Longitudinal excretory canal 
l.g. Lateral ganghon. 
lat c. Lateral canal. 
I n. Main longitudinal nerve. 
o. Opening of dome-shaped chamber. 
ov. Ovary. 
ov.d. Oviduct. 
p. r.c. Posterior ring commissure. 
r. Rostellum. 
r.c. RosteUar canal. 
r.m. Retractor muscles. 
r.n. Main rostellar nerve. 
r'.n'. Rostellar nerve. 
r. s. Receptaculum seminis. 
s. c. Canal to sucker. 
s. n. Nerve to sucker. 
s'.n'. Supposed nerve to sucker. 
sh.g. SheU-gland. 
t. Testis. 
t. c. Transverse excretory canal. 
u. Uterus. 
V. Vagina. 
