EXPLANATION OF PLATES. 
Abbreviations. 
Except when otherwise indicated, a prime (') mark following an abbreviation 
indicates that the organ in question belongs to an embryo. 
a. Anterior chamber of proboscis. 
can. Canal from middle to anterior 
chamber of proboscis. 
can. til. Ciliated canal of cerebral 
sense organ. 
cb. Brain. 
cl. n. Nerve cell. 
dt. Duct from accessory stylet poqch. 
emb. Embryo. 
foil. Follicular epithelium; follicle. 
gas. Stomach. 
gl. Glajid cell. 
gl. ce. Cephalic glands. 
in. Intestine, or endoderm of embryo. 
in. coe. Caecum of intestine. 
iteg. Integument. 
m. Middle chamber of proboscis. 
mb. ba. Basement membrane. 
mu. Muscular layers. 
mu. crc. Circular muscles. 
mu. Ig. Longitudinal muscles. 
nl. Nucleus. 
n. 1. Lateral nerve. 
nil. Nucleolus. 
oes. Esophagus. 
of. pyl. Opening of pylorus into 
intestine. 
o. sns. Cerebral sense organ, 
or. Ovum. 
ovy. Ovary. 
p. Posterior chamber of proboscis. 
prb. Proboscis. 
pyl. Pylorus. 
rhnc. Rliynchocoel. 
rhnd. Rhyncliodaeum. 
sp'go. Spermatogonia. 
sp'go’. Spermatocytes. 
spy. Spermary. 
sp'zo. Spermatozoa. 
va. sng. Blood vessel. 
vg. prb. Proboscis sheath. 
