Coss—Nematodes, mostly Australian and Fijian. 279 
papilla near the middle of the tail. The straight equal linear acute spicula are one 
and one-half times longer than the tail and are barely cephalated by expansion. The 
accessory piece is parallel to the spicula and is one-half as long as they. The reflexed 
portion of the testicle reaches one-fourth the distance back to the anus. The reader 
will do well to consult the drawings on Pl. xxxviu. 
Hab.—Decaying leaves of banana plants, Fiji, July, 1891. These worms are 
common on fresh and living grass, and on celery in Australia. 
5. R. coronata, n.sp. cuit sora ale 36mm. 18 the formula for the only specimen 
? 4 48 52 58 2°8 
seen. The cuticula was striated. The head was surmounted by six (?) conical lips 
each turned outwards. The cylindroid pharynx was about one-tenth as wide as long. 
The ellipsoidal median bulb was one-half as wide as the middle of the neck, and was 
situated half way between the mouth and the beginning of the intestine. The 
posterior bulb was of the same shape as the median, but was about half as wide again. 
Those portions of the cesophagus lying between the pharynx and the median bulb 
and between the median and posterior bulbs were equal in length but unequal in width, 
the latter being of the same width as the pharynx, while the former was twice as wide. 
The cardiac collum was distinct. The intestine was three-fourths as wide as the 
body. The ventral excretory pore was situated a little behind the nerve-ring. The 
latter was oblique, as is usual in Rhadditzs. The tail was conoid to the middle, and 
thence to the hair-like terminus narrow. For further information consult Pl. xxxvumu. 
Ffab.—In humus about the roots of banana plants, Fiji, July, 1891. 
sys 3: 15°6 228 2 856 ee ey ee : 
6. Rhabditis sp. (2). j>g2-3¢3a7-2 ®mm Young worms having the foregoing 
dimensions were abundant between the sheaths of diseased banana plants sent from 
Fiji, July, 1891. The cuticula was traversed by numerous transverse striz. The 
neck was conoid, the head truncate. There were six low lips on which no papille 
could be seen. The prismoid pharynx was one-eighth as wide as long. The anterior 
part of the cesophagus was one-half as wide as the neck, and to it succeeded an 
ellipsoidal median bulb, nearly two-thirds as wide as the neck; thence to the posterior 
bulb, which was of about the same size and shape as the median, the cesophagus was 
not above one-fourth as wide as the neck. The intestine was over two-thirds as wide 
as the body. The tail was conical. Further details with regard to this species will 
be found on Pl. xxxvu. 
Genus MONHYSTERA, Bastian. 
5 A 4 . try26 we, a . 2 . 
M. rustica, Biitschli. $$) 2mm. The cuticle seems destitute of strive. 
The nearly cylindroid neck terminates in a truncate head bearing near its margin 
six spreading sete, arising opposite the base of the pharynx, each one-fourth as 
