104 Moutliparts of Pediculus 
Fig. III. Pediculus humanus. Diagrammatic dorsal view of the head. The brain and nerve 
ganglia are omitted and only the beginning of the oesophagus is represented in order that 
the underlying stabber-sac and its contents may be revealed; letters taken clockwise. 
d. denticles; b.f. buccal funnel; d.b.pr. dorsal protractor of buccal funnel; v.b.pr. ventral 
protractor of buccal funnel; b.r. retractor (?) of buccal funnel; m.d-pr. medial dilator-pro¬ 
tractor muscles of pumping-pbarynx; d-l.d. dorso-lateral dilator muscles of pumping- 
pharynx; P.gl. Pawlowsky’s glands; l.d. lateral dilator muscle of pharynx; d.r. dorsal retractor 
muscle of pumping-pharynx; pp.rt. posterior (ventral) retractor of pumping-pharynx; e. eye; 
p-l.d. postero-lateral dilator muscle of pharynx; s.pr. protractor muscle of sac (“musculus 
digastricus” of Pawlowsky); s.rt. retractor muscle of sac; d.v.st. ramus of dorsal element of 
ventral stabber; d.st. ramus of dorsal stabber; d.st.r. retractor muscle of dorsal stabber; 
s.f.gr. floor groove of sac; oe. oesophagus; dil. three dilator muscles of pharynx; sph. three 
sphincter muscles of pharynx; pp. pumping-pharynx; st. stabbers; ph.t. pharyngeal tube; 
s.t. sac tube; b.fs. buccal festoon; h. haustellum. 
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