184 



TRICHOCEPHALUS AFFIMS, Rudolphi. 

 Pl,ATK XXVllI. 



Fig. 1. Piece of caecum with tiieliocephaU attucheH, natural size: a,a, females; l),h, 



males. 

 Fig. a. Male, X7: a, ca])illary ceplialicend ; 6, coiled caudal eud ; c, protruded in tro- 



mittent organ ; d, the couvoluted, and e, the straight portion of the seminal 



apparatus ;/, seminal reservoir ; jr, intestine. 

 Fig. 3. Female, X7 : a, capillary cephalic cud; 6, vulva; c, vagina; d, uterns; e, 



oviduct; /, couvoluted ovary; </, intestine. 

 I'ig. 4. Ciiudal end of male enlarged : a, oud of the hody ; T>, spine-covered tube of 



intromittent orgau ; c, its inflated end ; d, spiculum. 

 Fig. 5. Cross-section of end showing how the outside sheath becomes converted into 



the inside sheath of the tube: a, it, the sheath ; 6, the sac formed; c, the 



hollow spiculum. 

 Fig. 6. End of sheath, much enlarged, to show the relation between sheath and 



spiculum. 

 Fig. 7. The head. 



Fig. 8. The vulva and vagina, with an egg iu the passage. 

 Fig. 9. Eggs: a, eggs without .shells ; li, egg witli shell and its characteristic polar 



bodies; c, intermediate between o ami 6. 

 Fig. 10. Enlarged jiortion of worm from near the head. 



