TAPE-WORMS 



455 



C. The Adult Tape-Worm. 



1. In the human stomach the vesicle is digested, but the hollow knob 

 is not attacked by the acid gastric juices. On the contrary, it turns 

 inside out, like the finger of a glove, so that the hooks and suckers above 



f 



"AHMED" TAPE- WORM OF MAN. 



1, Egg, with embryo (proscolex), K., which at 2 has been liberated (x 500 times) ; 3 and 4, 

 cysticerci at 3 in section to show the invaginated hollow knob (Z.). which at 4 has been 

 turned out ( x 5 times) ; 5, adult tape-worm the two last : 'ripe" segments (proglottides) 

 have been separated from the rest : the actual tape-worm has a much larger number of 

 segments (somewhat less than natural size) ; 6, head with wreath of booklets (H.) and 

 suckers (S.) ; these structures are also seen in Figs. 3 to 5 ( x 25 times) ; 7, a ripe "pro- 

 glottis " and portions of two others the dark markings are the ramified ovaries 

 ( x 2J times). 



referred to come to lie on the outside. It now migrates to the small 

 intestine, and there attaches, or, as it were, anchors, itself by means of 



