44 6 



THE ANIMAL PARASITES OF MAN 



On the ventral wall one sees the two pairs of strong teeth, their 

 points being directed somewhat backwards. They are covered by 

 cuticle above and below, but their points are free, piercing the cuticle. 



lex 



Glc 



Rs 



Gcph 



, ... _ i. < 



Ctir 



Sp 



Bm- 



FlG. 323. Ancylostoma duodtnale, 

 male. B, bursa ; Bm, bursal muscles ; 

 Cdr, cement gland surrounding the ejacu- 

 latory duct ; Glc, cervical glands ; N, 

 nucleus of cephalic gland ; Nr, nerve ring ; 

 T, testes ; Sp, spicule ; Vs, vesicula semina- 

 lis. x 15. (After Looss.) 



V 



FIG. 324. Ancylostoma duodenalc, 

 female. A, anus ; Gcph, cephalic gland ; 

 N, nucleus of cephalic gland ; Glc, cervical 

 gland ; Ov, ovary ; Pex, excretory pore ; 

 J?s, receptaculum seminis ; Ut, uterus ; 

 V, vagina, x 15. (After Looss.) 



The "roots" of these teeth followed backwards appear as two 

 thickenings or ribs on the outside of the capsule wall, so that the 

 outside wall is not smooth a characteristic of the genus Ancylo- 

 stoma. In the space between these ribs lies the ventral nerve papilla, 



