28 Cobb — Nematodes, mostly Australian and Fijian. 



pharynx, then convex -conoid to the mouth, which is one-fourth as wide as the base 

 of the neck ; hp-region half as wide as the prolate cardiac bulb ; only traces of lips ; 

 no setae or papillae on the head ; oesophagus in the anterior half fusiform and about 

 half as wide as the neck, thence narrowing gradually to a tube one-fifth as wide as 

 the neck ; cardiac sucking bulb one-half as wide as the neck ; cardiac coUum distinct, 

 the constriction deep ; intestine thick- walled, four-fifths as wide as the body, with a 

 thick transparent lining ; cardia small, the cavity large ; rectum narrow, nearly twice 

 as long as the anal body-diameter, separated from the intestine by a distinct constric- 

 tion; ventral excretory pore somewhat behind the middle of the neck (12-5 %) ; 

 wings of the cuticle nearly as far apart as the opposite sides of the pharynx ; tail 

 conoid from the distinct anus, its terminus hair-fine ; near the anus two lateral glands 

 which empty through lateral pores at the beginning of the second sixth of the tail ; 

 vulva depressed ; vagina very short ; reflexed ovaries reaching half-way back to the 

 vulva ; eggs as long as the body is wide and two-thirds as wide as long. Sketches of 

 this little species are given on PI. i. 



Hab. — Grass after rain, Sydney, New South Wales, Australia. 



2. R. pellioides, Biitschli. W "ig ^4-3 'T? %b •stoimm. Cuticle transversely striated ; 

 neck conoid, tapering more rapidly near the head ; head truncate ; lips six, hemi- 

 spherical, each with a papilla ; pharynx simple, prismoid, one-third as wide as the 

 head ; median and cardiac bulbs powerful, subspherical, two-thirds as wide as the 

 neck, the median situated in the middle of the neck ; oesophageal tube in front of the 

 median bulb half as wide as the neck, behind the bulb one-third ; ventral excretory 

 pore somewhat nearer the cardiac than the median bulb; intestine rather thick- walled, 

 three-fourths as wide as the body ; rectum considerably longer than the anal body- 

 diameter ; tail concave-conoid ; vulva inconspicuous ; reflexed portions of the ovaries 

 reaching half-way back to the vulva ; eggs nearly as long as the body is wide and 

 two-thirds as wide as long; viviparous or ovo viviparous; lateral pores near the middle 

 of the tail. %% — ^.g 5.3 3.4 — % -5 mm. Male tail conical, completely enveloped in the bursa, 

 which springs from opposite the middle of the spicula; ribs of the bursa nine, in three 

 similar rather indistinct groups because the spaces between the groups are not much 

 greater than that between the individual ribs of a given group ; anterior group just 

 in front of the anus, posterior group near the end of the tail ; spicula linear, tapering 

 gradually from near the proximse to an acute point, more than twice as long as 

 the tail ; proximse cephalated by constriction. Detailed drawings are given on 

 PI. III. 



Hab. — Cosmopolitan ; Europe, Australia, Fiji. I think there can be no doubt 

 that this worm recorded now from Australia and Fiji is identical with Biitschli's 

 species. I have found it on fresh grass and on dead sheaths of banana plants. 



