Text-fig. 10. Pediculus humanus $. Posterior portion of abdomen, ventral aspect, showing 
ventral plate ( v.pl .) with its antero-lateral extensions (ext.) at times separated. (A) Specimen 
19 (same as in Text-fig. 9 a); (B) Specimen 25; (C) Specimen 28; (D) Specimen 30; 
(E) Specimen 22 (same as in Text-fig. 9 b); (F) Specimen 29, showing asymmetric gonopods 
and posterior abdominal lobes, (E) being capitis, the rest corporis. (N. del.) 
SPECIMEN 24, £>. Not illustrated. 
Dorsal bands as in d, complete. Legs: pair I as in d, pair III as in ?. 
$ ventral plate well developed, with antero-lateral extensions having crenate 
borders. Gonopods normal. Posterior abdominal lobes much reduced and 
only visible dorsally. Dorsal abdominal muscles macerated, but apparently 
as in $, ventral muscles as in $. 
D. Keilin and Gt. H. F. Nuttall 293 
SPECIMEN 23, £. Not illustrated. 
Dorsal bands as in d, complete. Legs: pair I as in d, pair III as in $. 
$ ventral plate very large, bearing perforations anteriorly. Gonopods 
normal, strongly chitinized. Abdominal muscles: dorsally as in d, ventrally 
as in 
