184 



TRICHOCEPTTALUS AFFIMS, Rnaolphi. 

 Platk XXVIII. 



Fig. 1. Piece of cccnm witli trichocephaU attached, natural size: a, a, females; h,h, 



males. 

 Fig. 2. Male, X7: a, ca))illary cephalic end ; &, coiled caudal end ; c, protruded in tro- 



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



apiiaratus ; /, seminal reservoir ; g, intestine. 

 Fig. 3. Female, x7 : a, capillary cephalic end; h, vulva; c, vagina; d, uterus; c, 



oviduct; /, convoluted ovary; g, intestine. 

 P'ig. 4. Caudal end of male enlarged: a, end of the body ; h, spine-covered tube of 



intromittent organ; c, its iuQatod end ; rf, spiculum. 

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



the inside sheath of the tube : a, n, the sheath ; h, 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 in the passage. 

 Fig. 9. Eggs: a, eggs without shc^lls ; h, egg with shell and its characteristic polar 



bodies; c, intormediatd between a and h. 

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



