PLATE 4 
A. —Dorylaimus regius de Man; head end of the body with beginning of the 
intestine; car gl, cardiac gland; ex p, excretory pore; nrv r, nerve ring; ppl, skin 
papillae. 
B. —Cephalobus subelongatus Cobb; a-i, sketches of spermatozoids showing 
amoeboid movements. 
C. —Same; dorsal view of head end; amph op, amphidial opening; d 1, dextero 
dorso submedial lip; gl, apparently glandular cell attached to the amphidial 
pouch; t, terminals (sensilles?). 
D. —Same; amphid seen laterally. 
E. —Same; optical cross section of the head just behind the lip region at the 
level of the amphidial openings; amph, amphid. 
F. —Same; cross section behind the pharynx; amph, amphid; d ch, dorsal 
chord; gr t, granular tissue; 1 ch, lateral chord; msc, radial oesophageal muscles; 
oe, oesophageal channel; t, terminals, v ch, ventral chord. 
