60 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



Order CHROMADORATA 



Fig. 27. Paraplectus pedunculatus (Hofmanner). Note the striated 

 cuticle, the long and narrow mouth capsule, the strongly 

 marked amphid, and the thickening of the cuticle anteri- 

 orly. After Filipjev, 1929. 



Fig. 28. Dermatolaimus steineri Filipjev. Note the anterior thicken- 

 ing of the cuticle, more or less wide attachment of the 

 esophagus to it, and the amphid, which is round with a pos- 

 terior prolongation. After Filipjev, 1922. 



Fig. 29. Aphanolaimus attentus de Man. Note the peculiar amphids. 

 After de Man, 1884. 



Fig. 30. Aphanolaimus attentus de Man, side view. After de Man, 

 1884. 



Fig. 31. Cyatholaimus deniani Filipjev, showing the en face view of 

 the head. Note the 12-fold vestibulum and the dorsal on- 

 chium in the mouth capsule. After de Man, 1889b. 



Fig. 32. Cyatholaimus demani Filipjev, side view. Note the 6 labial 

 papillae, 10 cephalic setae, the folds of the vestibulum, the 

 onchium, the spiral amphid, the points of the cuticle, and 

 the eye, and compare with the preceding figure. After de 

 Man, 1889b. 

 Pl. 3, Fig. 33. Halichoanolaimtis filicauda Filipjev, lateral view of the head. 

 Note the two chambers of the mouth capsule, and the am- 

 phids and cuticle like those of Cyatholaimus. After Filip- 

 jev, 1918. 



Fig. 34. Halichoanolaimiis filicauda Filipjev, view en face. Note the 

 true lips with the labial papillae. After Filipjev, 1918. 



Fig. 35. Halichoanolaimus filicauda Filipjev, showing at a deeper 

 focus the 12 rods of the anterior part of the mouth cap- 

 sule, the 3 spines and the comblike apparatus marking the 

 boundary of its two parts. After Filipjev, 1918. 



Fig. 36. Cheironchus bulbosus (Filipjev). Note the two high lips, 

 with huge labial papillae, the spiral amphids, and the two 

 powerful jaws. After Filipjev, 1918. 



Fig. 37. Cheironchus hulbosus (Filipjev), ventral view. After Filip- 

 jev, 1918. 



Fig. 38. Cheironchus bulbosus (Filipjev), view en face. Note the two 

 jaws, the dorsal rudimentary lip, and the disposition of the 

 papillae and cephalic setae. After Filipjev, 1918. 



Fig. 39. Synonchium obtusum Cobb, a nematode with three jaws 

 like Enoplus. The cuticle and amphids are like those in the 

 Cyatholaiminae and the other genera of the Choanolaimi- 

 nae. After Cobb, 1920. 



Fig. 40. Synonchium obttisum Cobb, showing the mouth open and the 

 lips protruded. After Cobb, 1920. 

 Pl. 4, Fig. 41. Richtersia collaria Steiner. Note the characteristic short and 

 thick body form, and the longitudinal striation produced by 

 rows of minute cuticular spines ; the powerful esophagus, 

 spiral amphids and pointed cuticle leads to a comparison 

 with the Cyatholaiminae. After Steiner, 1916. 



