BUTTERWORTHsa. 



Fig. 21a. Dipylidium caninum- The commonest dog -tapeworm. 



1. A tapeworm ( X 4 J). 



2. Scolexof same(x 78). (f) rostellum. 



3. Hook from rostellum(X 170). 



4. A mature proglottid (x 31). () cirrus-sac 

 (n) lateral nerve ; (pv) ovary ; (<) testes ; (v) 

 yolk-gland. 



5. The shell-gland and surrounding ducts, (o) ovidact 

 gland ; () uterus ; (v) vagina ; (yd) yolk duct. 



6, A detached ripe proglottid ( x 17). (tc) egg capsule? 



7. Egg capsule containing eggs (x 300). 



8. Egg(x 400). 



(ex c) lateral excretory oanal ; 

 (vd) vas deferens; Q/'j) 



(ov) ovary; (shg) shell- 



