I. IJI9IA. 



ON A NEW CESTODE LARVA PARASITIC IN MAN. 



PLATE. 



Explanation of figures. 



Plerocercoides p'olifer. 



Fig. 1. A vertical slice of the skin and subdermal tissues taken from the 

 left thigh of the patient, showing numerous encysted Plerocercoides 

 proiifer in situ. Hardened in alcohol. Above, the epidermis. From 

 some of the cysts the worm had fallen out. Natural size. 

 Fig. 2 a-g. Seven separate pieces of the worm taken from a single large 

 cyst. Magnified li times. Photographed after fixing with corrosive 

 sublimate, a-c, simple Plerocercoids. d, a strongly constricted piece 

 of the worm (with involuted head ?). e-g, irregularly shaped pieces 

 budding out heads. 

 Figs. 3-15. Worms in various shapes; all drawn from fixed specimens, 

 magnified 4 times. 

 Fig. 3. A specimen of simple Plerocercoid shape, with the extreme 



head-end invaginated. 

 Fig. 4. Plerocercoid bearing a branch-like supernumerary head on 



one side. 

 Fig. 5. A similar specimen, bearing two supernumerary heads and 



strongly constricted in the middle. 

 Fig. 6. A specimen with a branch-like bud ; the terminal head, either 



not present or strongly withdrawn. 

 Figs. 7 and 8. Irregular-shaped specimens with numerous heads formed 



by budding. 

 Figs. 9 and 10. Contracted specimens, either without the head or 



with the same strongly wrthdrawn. 

 Fig. 11. A specimen, irregularly coiled and with tubercle-like pro- 

 tuberances. 

 Fig. 12. A piece constricted off from the hind parts of a Plerocer- 

 coid. Invaginated at both ends. 

 Fig. 13. A Plerocercoid greatly stretched out, but with the extreme 

 head-end still retracted. 



