30 Cobb — Nematodes, mostly Australian and Fijian. 



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 iii. 



Hab. — Decaying leaves of banana plants, Fiji, July, 1891. These worms are 

 common on fresh and living grass, and on celery in Australia. 



< ,30 



5. R. coronata, n.sp. \. \^ '^X.^ %^ ^X-^, -semm. is the formula for the only specimen 

 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 oesophagus 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 coUum 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 Rhabditis. The tail was conoid to the middle, and 

 thence to the hair-like terminus narrow. For further information consult PI. iii. 



Hab. — In humus about the roots of banana plants, Fiji, July, 1891. 



6. Rhabditis sp. (?). 1-9 ^3-2 ^1'! 3-4 ^2-'' ■^°™- 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 striae. The 

 neck was conoid, the head truncate. There were six low lips on which no papillae 

 could be seen. The prismoid pharynx was one-eighth as wide as long. The anterior 

 part of the oesophagus 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 oesophagus 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 PI. iii. 



Genus MONHYSTERA, Bastian. 



M. rustica, Biitschli. 2-2 ? \ \-i ^2-8 ■*2°™- The cuticle seems destitute of striee. 

 The nearly cyhndroid neck terminates in a truncate head bearing near its margin 

 six spreading setse, arising opposite the base of the pharynx, each one-fourth as 



