Gr. H. P. Nuttall 
328 
Key to the Lettering Accompanying the Illustrations. 
An. = anus. 
art. = articulation. 
B. P. = basal plate. 
B. PI. cl. = bfisal plate cleft. 
D. ej. = ductus ejaculatorius. 
Dil. = dQator (the parameres). 
Dil. cl. = cleft in the dilator. 
Dil. 1. sp. = lateral spur on dilator. 
Gl. acc. = accessory gland. 
Oon. = gonopod. 
int. = intestine. 
ligt. = chitinous ligament fixing vagina. 
M. d. a. = longHudinal dorsal abdominal muscles. 
m. i. = muscular insertions in chitin. 
M. constr. vi. = muscles, constrictors of uterus (transverse and oblique!. 
M. flex. dil. = muscles, flexors of the dilator. 
M. pro. pi. = muscles, protractors of basal plate. 
M. reir. d. v. = muscles, dorsal retractors of vaginal wall. 
M. reir. pi. = muscles, retractors of basal plate. 
M. reir. ut. = muscles, retractors of uterus. 
M. reir. v. p. = muscles, retractors of vesica penis et al. 
M. reir. v. v. = ventral retractors of vaginal wall. 
M. V. a. = muscles, longitudinal ventral abdominal muscles. 
ov. = ovaries. 
p. g. f. = post-genital fold. 
p. 1. = posterior lobes of ninth segment ($). 
p. pi. = pregenital plate, facing pregenital fold. 
Pen. = penis. 
r. p. = rugose portion of vesica penis. 
reel. = rectum. 
segt. = segments of abdomen, numbered sixth to ninth. 
sh. — collar-like sheath beneath protruded dilator. 
St. pen. = statumen penis. 
Stig. = spiracle. 
track. = trachea. 
tr.f. = transverse folds of abdominal wall (c?). 
Ut. = uterus. 
V. pen. = vesica penis. 
V. pen. J. = folds of inverted vesica penis. 
V. pen. at. = stem of vesica penis. 
r. p. = ventral plate over vagina. 
vag. - vaginal orifice. 
vag.fl. — vaginal flap. 
vag.-ul. = vagina ends and uterus begins. 
X = break in section, see legend to Text-fig. 3. 
