SUBGENUS MONONCHUS 



(s. s. 459) 157 



ii. M. major Cobb. Labial papillae of the inner row each with 3 (?) nerve- 

 endings. Amphids slightly farther forward than the apex of the dorsal tooth, 

 small. Lateral fields one-fifth as wide as the body. Intestine composed of rather 



small cells, 

 3.4 mm , 



snowing an 



.6 6. 



19. 



'55 



25 



95. 



2.6 



2.9 



-M- 45 



1.5 



indistinct tes- 



2.3 2.9 2.8 2^ sellation. The 



eggs are probably less than twice as long as 

 wide. Each of the 12 rather conspicuous, 

 echinulate, mammiform accessory organs is 

 situated on the posterior side of a transverse 

 ceratinous ridge extending one-fourth the dis- 

 tance around the body. The anterior two or 

 three and the posterior one of these organs 

 are smaller than the others. There are 2 pairs 

 of ventrally submedian papillae, also inner- 

 vated, on the anterior third of the tail, the 

 posterior pair being near the end of the an- 

 terior third, and the other pair half way be- 

 tween- that point and the anus. There are 

 other papillae faintly visible on the dorsal side 

 of the tail and elsewhere (fig. 16). The fe- 

 males of this species also present papillae near the vulva: 3 small, ventrally 

 submedian papillae on each side of the body, one opposite the vulva, one a short 

 distance in front of it and another a short distance behind it, and in addition a 

 tandem series of 3 papillae, both in front of and behind the vulva, on the ventral 

 line. The location and conformation of these papillae is shown in figure 12. Doubt- 

 less the females of other species possess similar papillae. Fixed with osmic acid; 

 examined in water. 



Found about the roots of plants, in damp soil, Moss Vale, New South Wales, 

 Australia. Also about turnips in Tasmania. This species resembles the following. 

 Fig. 25. 



12. M. gerlachei de Man. Lateral fields about one-third as wide as the body. 

 In transverse section the buccal cavity, though nearly round, is obscurely three- 

 sided, and shows the existence of 3 small, longitudinal grooves in the wall of the 

 2. 5.2 18. '50' 33 92.5 _ 



1.8 

 2. 



2. 

 95.5 



1.8 ? ? 3.7 2.3 



pharynx, presumably so functioning as 



to increase the elasticity and mobility of 



the pharyngeal walls. What appears to 



be a renette pore occurs immediately 



behind the nerve-ring. Anal muscles 



are well developed in the female. Spic- 



ula arcuate, tapering both ways, about 



one and one-third times as long as the 



anal body-diameter, and in their widest 



part about one-sixth as wide as the 



corresponding portion of the body. The 



accessory pieces are about one-third as long as the spicula, relatively small and 



poorly developed, appearing to be parallel to them when viewed in profile. The 



