AXCYLOSTOMA DUODENALE 449 



different terminology for these rays as used by various authors 

 should be noted : Ventral =5 anterior ; externo-lateral == antero- 

 external ; medio-lateral + postero-lateral or antero-median + postero- 

 median =-. median (doubled); externo - dorsal == postero - external ; 

 dorsal = posterior. All the rays end in tactile papillae, seven, on each 

 side ; the postero-external and antero-external on the outer surface of 

 the bursa, the five others on the inner surface. 1 Of the six terminal 

 digitations of the dorsal ray, only the external two contain tactile 

 papillae. 



In the male there are prebursal papillae and minute caudal papillae 

 in the female. 



In the female the inner layer of the cuticle projects at the posterior 

 end as a sharp spike, 20 p long, which may sometimes be broken off. 



Ovaries. The anterior tube runs from the cephalic to the posterior 

 end and back again. The posterior tube begins anteriorly, runs to the 



Ca 



FlG. 327. Ancylostoina duodenak : bursa enlarged. Ca, anterior r?y 

 cleft ; cle, antero-external ; els, antero-median ; dp, postern-median ; Cde, 

 postero external ; Cd, posterior bifurcated, each bifurcation tridigitate. 

 After Railliet.) 



posterior end of the body, and then back to the cephalic end, form- 

 ing a vulval loop before ending. The ovaries on the whole run in 

 oblique coils. The uterus is the thicker portion of the tube, 5 mm. 

 long. A short tube connecting the ovary and uterus is the oviduct. 

 The two uteri unite to form a single duct, the vagina, opening i mm. 

 behind the middle line. The portion of the uterus next to the oviduct 

 functions as a seminal receptacle, whereas the part next the vagina 

 functions as an ovejector. 



Testis. The blind end begins a little behind the beginning of 

 the cement gland. The transverse coils occupy the middle third of 

 the body. About the middle of the body it passes into the spindle- 

 shaped seminal vesicle, which, with the spicular canal and rectum, 

 opens into the cloaca. An anterior longitudinal coil pushing in 

 between the cervical glands is characteristic of Ancylostoma. The 

 cement gland surrounds the ejaculatory duct for practically its whole 

 course, and it occupies nearly the posterior half of the body and 



1 This also occurs in other Strongylidte, e.g., in the genus Strongylus (Syn. : Sclerostomum). 



