278 Macueay Memorrat Vonvume. 
; 1:12: 17: ‘55-59 93-9 : 
3. R. australis, n.sp. (?). iggsag-ae7 34 11mm = Cuticula finely transversely 
striated ; neck conoid, convex anteriorly ; head somewhat pointed, truncate at the 

lips ; lips six, conical, each with a setose papilla ; pharynx simple, prismoid, tapering 
at the base, about one-third as wide as the head and more than twice as deep as wide; 
anterior three-fifths of the cesophagus cylindroid, about one-third as wide as the 
corresponding part of the neck; cardiac sucking bulb ellipsoidal, half as wide as the 
base of the neck, connected with the wider anterior three-fifths of the cesophagus by 
a tube one-fifth as wide as the corresponding part of the neck ; intestine thin-walled, 
four-fifths as wide as the body ; rectum as long as the anal body-diameter ; ventral 
excretory pore just behind the nerve-ring; tail conical; vulva slightly elevated ; 
vagina extending forward half-way to the cardiac region and containing spermatozoa 
near the flexure ; ovary very long, reflexed and extending backward to near the anus ; 
eggs ellipsoidal, as long as the body is wide and two-thirds as wide as long, thin-shelled, 
perhaps deposited before segmentation begins. 
Hab.—Grass, Sydney, New South Wales, Australia. 
40 
ce : 274 13° 20° ‘80° 90° . : 
4. R. monhystera, Biitschli. 4-3-3 7. The cuticula of this cosmo- 
politan species is traversed by about four hundred transverse striz. The posterior 
half of the neck is conoid, the anterior half convex-conoid. The truncate head, devoid 
of sete, is surmounted by six spherical lips having a height equal to one-third the 
length of the pharynx, and each surmounted by a conspicuous projecting papilla. 
The simple cylindroid pharynx is about one-fourth as wide as long. The median 
cesophageal bulb is of about the same length as the pharynx and is one-half as wide 
as the neck; that portion of the cesophagus leading to it is a little more than 
one-third as wide as the neck, and that portion leading from it to the posterior bulb 
is a trifle narrower than that. The prolate posterior bulb is a little wider still than 
the median bulb and contains a distinct chitinous valvular apparatus. The cardiac 
collum is distinct. The ventral excretory pore is situated opposite the anterior part 
of the hindmost bulb. The oblique nerve-ring passes ventrally backward. The tail 
is conical to the pointed terminus. The lateral fields are one-fourth as wide as the 
body. The narrow reflexed ovary extends from one-fourth to one-half the distance 
back to the vulva. Passing round the bend the ova are fertilised and then develop 
in the uterus, those near the vulva being always more advanced than the others. 
oe a *"omm. The tail of the male is conical and pointed ; it is completely 
enveloped by the bursa, which begins opposite the proximal ends of the spicula. 
The ribs of the bursa are distributed in three groups: 1,a pre-anal group of two 
opposite the middle of the spicula ; 2, a post-anal group of three occupying the 
anterior third of that part of the bursa behind the anus; 3, a post-anal group of 
three near the end of the tail. I saw on one specimen what appeared to be a ventral 

