88 NORTH AMERICAN 



PLATE III. 

 PRISMATOLAIMUS, de Man, 1880. 



Fig. 4. Prismatolaimus stenurus, n. sp. I, lateral view of a female; 

 II, front view of head ; III, side view of head. 



a, one of the six cephalic papillae ; b, one of the ten cephalic setae ; c, 

 one of the six thin lips; d, pharynx; e, amphid; f, lumen of the oesophagus; 

 g, nerve-ring; h, cuticle; i, nucleus of ovum; /, vulva; k, blind end of pos- 

 terior ovary; /, egg; m, beginning of the intestine; n, one of the cells of the 

 wall of the intestine ; o, rectum ; p, anus ; q, one of the caudal glands ; r, flex- 

 ure in anterior ovary; s, spinneret. 



SPILOPHORA, Bastian, 1865. 

 Fig. 5. Spilophora canadensis, n. sp. Side view of male. 



a, one of the lips ; b, dorsal pharyngeal tooth partly exserted ; c, pharynx ; 

 d, base of the pharynx ; e, lumen of the oesophagus ; /, nerve cells ; g, nerve- 

 ring; h, excretory pore; i, chitinous valve of the cardiac bulb; /, one of the 

 two lateral, longitudinal rows of cuticular markings; k, lumen of the intes- 

 tine; I, renette cell; m, nucleus of renette cell; n, cell accessory to the renette 

 cell ; o, blind end of single testis ; p, point in the cuticle where the striation is 

 reversed ; q, vas deferens ; r, one of the spicula ; s, anus ; /, one of the caudal 

 glands; u, spinneret. 



MICROLAIMUS, de Man, 1880. 



Fig. 6. Microlaimus fluviatilis, n. sp. I, lateral view of female; II, 

 head of the same. 



a, Mouth opening; b, one of the six cephalic papillae; c, one of the four 

 cephalic setae; d, one of the small pharyngeal teeth; e, excretory pore; /, 

 spiral amphid; g, oesophagus; h, nerve-ring; i, cardiac bulb; /, preliminary 

 portion of the intestine ; k, renette cell ; /, body cavity ; m, lumen of intestine ; 

 n, one of the cells of the intestine; o, anus; p, flexure in posterior ovary; q, 

 uterus ; r, blind end of posterior ovary ; s, one of the three caudal glands ; t, 

 spinneret; uu, eggs; v, vulva; w, cuticle. 



TRIPYLA, Bastian, 1865. 

 Fig. 7. Tripyla lata, n. sp. Lateral view, male specimen. 



a, cephalic seta; b, one of the three lips; c, amphid; d, spermatozoa; e. 

 spermatocytes in anterior testis ; /, posterior extremity of the oesophagus ; g, 

 nerve-ring; h, cuticle; i, oesophagus; /, lumen of oesophagus; k, intestine; 

 /, spermatocytes in posterior testis ; m, one of the numerous ventral male 

 papillae ; n, vas deferens ; o, retractory muscle of spiculum ; p, one of the 

 spicula ; q, lumen of the intestine ; r, duct of one of the caudal glands ; s, 

 caudal gland ; t, spinneret. 



