Cossp—Vematodes, mostly Australian and Fijian. 269 
contain but one at a time. I do not know whether segmentation begins before the 
egos are deposited. Male unknown. Figures of this species are given on Pl. xxxrx. 
along with those of D. parvus. 
Hab.—On decaying outside sheaths of young banana plants, Fiji, July, 1891. 
. ss : 2°(2) 2 13° ‘50’ 68° 2 s 
5. D. filicaudatus, Biitschli. [Q—-7—p Sy rmm. Neck conoid ; cephalic setz 
apparently four ; pharynx nearly as deep as the head is wide, and more than one-half 
as wide as the head; dorsal tooth projecting and thumb-shaped, reaching nearly to 
the middle of the pharynx; near the bottom of the pharynx two small submedian 
teeth. The uterus appears never to contain more than one egg at a time. 
Flab.—Cow-dung, Germany. 
. MAr 2s) S75 ia £40:") az oO 
6. D. australis, n.sp. =—s7-3— 33-3 mm. [ cannot state positively whether 
this female is not the mate of that described later on under the name LD. gvaminum. 
They were found together and have the same proportions, but there are marked 
differences in the structure of the pharynx in the two specimens. In the present 
species the cuticle is finely transversely striated. The pharynx is twice as deep as 
wide, being simply deeply cyathiform in shape, and two-fifths as wide as the head. 
The dorsal tooth is simple in character and extends half-way to the lips. Just behind 
the pharynx the cesophagus is somewhat swollen, its greatest width in this part being 
considerably less than that of the ellipsoidal median bulb, which is four-fifths as wide as 
the middle of the neck. The posterior bulb is longer and narrower than the median. 
Between the pharyngeal and the median bulbs the cesophagus is two-fifths as wide as 
the neck, but between the median and cardiac bulbs it is only one-third as wide as the 
neck. The intestine is very narrow at first,—only one-fourth as wide as the body,— 
but soon becomes three-fourths as wide as the body. The narrow rectum considerably 
exceeds the anal body-diameter in length. The reflexed ovaries reach nearly back to 
the vulva and contain numerous ova arranged in several rows. The eggs are twice 


as long as the body is wide and one-third as wide as long. The tail is conoid, being 
setaceous in the posterior half. 
F{ab.—Grass, Sydney, New South Wales, Australia. 
Ate 2-17-22: 14378 68: are itudi 
7. D. minima, n.sp. S—aS s tmm. «= The cuticle is traversed longitudinally 

by about fourteen equidistant striz or wings, so arranged that one of them does xo¢ 
fall on a lateral line, resolvable into dots ‘7p apart, thus indicating the presence also 
of about six hundred transverse strixv. Neither sete nor lateral organs were seen. 
The triquetrous pharynx is about one-fifth as wide as the head; the dorsal tooth 
is elongated and projects but slightly, although its apex approaches to near the 
lips. The ellipsoidal median bulb is two-thirds as wide as the neck, the cardiac 
bulb being, as usual, somewhat smaller and weaker. The transparent thick-walled 

