94 NORTH AMERICAN 



PLATE VI. 

 TRILOBUS, Bastian, 1865. 



Fig. 15. Trilobus longus, (Leidy), Bastian. I, male specimen, lateral 

 view; II and III, head of the same, lateral view; IV, head, dorso-ventral 

 view; V, VI, and VII, enlarged views of the ventral supplementary organs. 



a, lateral cephalic seta ; b, cephalic papilla ; c, submedian cephalic setae ; 



d, pharynx; c, amphid; /, anterior pharyngeal tooth; g, posterior pharyngeal 

 tooth ; h, oesophagus ; i, nerve-ring ; /, excretory pore ; k, nerve cells ; / gland- 

 ular (?) organs; m, lumen of intestine; n, blind end of anterior testis ; o, 

 testis; p, junction of testes; q, blind end of posterior testis; r, vas deferens; 

 s, anterior male supplementary organ of the anterior series ; t, anterior sup- 

 plementary organ of the posterior series ; u, spicula ; v, accessory piece ; w, 

 caudal gland ; x, anus ; y, terminus ; z, nerve ending of papilla of the supple- 

 mentary organ. 



DOLICHODORUS, nov. gen. 



Fig. 16. Dolichodorus heterocephalus, n. g., n. sp. I, nearly side view of a 

 female; II, lateral view of surface of head, more highly enlarged; III, sagit- 

 tal section of head; IV, dorso-ventral view of head; V, front view of head; 

 VI, side view, posterior extremity of male ; VII, ventral view of posterior 

 extremity of female; VIII, ventral view of posterior extremity of male. 



a, papilla ; b, cephalic organ of unknown significance ; c, spear ; d, base of 

 spear; e, median bulb; /, nerve-ring; g, excretory pore; h, cardiac swelling; 

 t, intestine ; /, anus ; k, lateral caudal pores ; I, terminus ; m, blind end of pos- 

 terior ovary ; n, ovary ; o, left spiculum ; p, accessory piece ; q, distal end of 

 Accessory piece ; r, left flap of bursa ; s, terminus of male ; t, ovum ; u, sper- 

 matozoa ; v, vaginal muscles ; w, uterus ; x, vulva ; y, anus. 



CYATHOLAIMUS, Bastian, 1865. 



Fig. 17. Cyatholaimus truncatus, n. sp. I, side view of a female ; II, side 

 view of head ; III, front view of the same head ; IV, ventral view of anal 

 region of male; V, lateral view of the same; VI, lateral view in the middle 

 of the body showing cuticular markings and pores. 



a, submedian cephalic seta ; b, labial papillae ; c, amphid ; d, dorsal tooth ; 



e, lateral cephalic seta ; /, one of the twelve ribs of the vestibule ; g, small 

 submedian pharyngeal tooth ; h, base of the pharynx ; i, ejaculatory duct ; /, 

 intestin* ; k, one of the four male pre-anal supplementary organs ; I, one of 

 the spicula; m, anal muscles; n, one of the accessory pieces; o, nerve-ring; 

 p, one of the cells of the intestine ; q, lumen of the intestine ; r, anus ; s, blind 

 end of reflexed ovary; /, egg; u, vulva; v, flexure in anterior ovary; w, 

 junction of the ovary and uterus; x, pores in the cuticle; 3;, one of the three 

 caudal glands; z, male gland (?). 



