130 



THE CESTOIDEA 



destroying more or less of the brain, causing the disease known as " gid " 

 or " staggers." C. serialis, Raill., of dog, with Coenurus in the connective 



Fio. XX. 



1. Taeniarhynchus saginata, Goeze ( x J) ; entire strobila. 



2. Anterior part of the same ( x 8) as an example of unarmed tapeworms. 



8. The scolex of Taenia solium, Rud. ( x 22), showing the rostellum with double crown of 

 hooks. 



4 A genitally mature proglottid of T. saginata (x 7). a, lateral nerve ; b, lateral excretory 

 canal ; c, testes ; d, genital papilla ; e, genital pore ; /, cirrus ; g, sperm duct ; h, testes ; t, 

 vagina ; j, germarium. The ootype and shell gland are unlettered. The vitellarium is the small 

 organ behind the germarium. n, uterus. 



5. The ootype and female ducts related to it (x 30). i, vagina ; k, ootype, the shell glands 

 not shown ; I, vitello-duct ; m, spermatheca ; n, uterus ; oo, genn ducts ; p, fertilising canal, 

 i.e. the lower end of the vagina. 



6. A detached ripe proglottid of T. saginata ( x 2), with fully formed uterus filled with eggs. 



7. Six-hooked embryo. (All after Leuckart.) 



tissue of the wild rabbit and various rodents. Echinococcifer, Weinl., 

 scolex with two circles of hooklete. The metacestode is known as 



