C. H. Treadgolb 
135 
KEY TO LETTERING. 
A.P. = position of anal pore; A.P.C. =anal pore-chamber; C.B. = comma-shaped bodies; 
C.V. = central viscus; E.M. =egg membrane; Ex.C. — excretory cell; Ex.P. — position of excretory 
pore; Ex.p.c. = excretory pore-chamber; G.C. = genital cell; N R. = nerve ring; N.S.C. = nuclei of 
subcuticular cells; S.G.C. = subsidiary genital cells; S.P. = spermatozoon; Sir. = streaks connecting 
excretory cell with central viscu® T.S. =tail spot. 
PLATE IX. 
Loa papionis after fixing in 70 per cent, alcohol at 60° C. and clearing in lactophenol. 
Fig. 1. Anterior extremity of 9. Showing cephalic cone, oesophagus, nerve ring and oesophageal 
gland. 
Fig. 2. Lateral view of posterior extremity of <$. Showing spicules and six out of the seven 
genital papillae on the right side; the fourth papilla is invisible. 
Fig. 3. One-half of posterior extremity of $ after removal of spicules and hemisection. The 
fourth genital papilla is now visible. 
Figs. 1 and 2 x by about 180. 
KEY TO LETTERING. 
C.C. = cephalic cone; Cut. = cuticle; L.G. = lateral ganglion; N.B. — nerve bundles; N.R. = nerve 
ring; 0. = oesophagus; O.G. — oesophageal gland; P^ 2 i etc. = first, second genital papillae, etc.; 
Spic. = spicule; Sir. = striae. 
