40 Cobb — Nematodes, mostly Australian and Fijian. 



by a tube one-fourth as wide as the part of the neck it traverses; ventral excretory- 

 pore opposite the nerve-ring ; intestine thick-walled, with a distinct chitinous lining ; 

 rectum as long as the anal body-diameter; tail conical; vulva elevated; female sexual 

 organs probably double and symmetrical. 



Hab. — Lettuce, Sydney, N.S.W., Australia. 



2. 0. infestans, n.sp. Female unknown. ^. — 3.9 4.4 4.5 — §: 62 mm. The cuticle is 

 not striated and is destitute of hairs. The conoid neck ends in a small truncate head 

 with a slightly expanded lip-region. Neither setae nor papillae were seen on the 

 head. The anterior half of the pharynx is triquetrous and about one-fourth as 

 wide as the head, while the posterior half is much narrower. The cylindrical anterior 

 half of the oesophagus is about one-third as wide as the corresponding part of the 

 neck ; the posterior half is at first very slender, less than half as wide as in the 

 anterior part, but expands finally to form an ellipsoidal bulb half as wide as the base 

 of the neck. There are no eyes. The intestine is three-fourths as wide as the body. 

 The tail is conoid. The length of the two equal elongated arcuate acute spicula is 

 equal to that of the anal body-diameter ; the proximae are cephalated by constriction. 

 The two accessory pieces are more than half as long as the spicula and are arranged 

 parallel to them. At least four pairs of submedian papillae occur on the posterior 

 part of the male : 1, a pair as far in front of the spicula as the heads of the latter are 

 in front of the anus ; 2, a pair opposite the anus ; 3, a pair at the beginning of the 

 central third of the tail ; 4, a pair at the end of the second third of the tail, i.e., as 

 far behind the anus as the pre-anal pair is in front of it. The blind end of the single 

 reflexed testicle lies as far behind the cardia as the latter is behind the lips ; from 

 thence it passes forward half-way to the cardia, then turns backward. The ejacula- 

 tory duct appears to be twice as long as the tail. Sketches of this worm occur on 



PI. IV. 



Hab. — Found in great numbers (young) among the sheaths of diseased banana 

 plants, Fiji, July, 1891. 



Genus AULOLAIMUS, de Man. 



A. exilis, n.sp. i-e 1-9 21 ~ 2- — r i""^"™- I place this worm with some hesitation 

 in Dr. de Man's genus Aulolaimus for reasons that will be plain on comparing the 

 Fiji worm with that of Holland. The cuticle appeared to me entirely naked and 

 destitute of striae. The sub-cylindroid neck terminates in a convex-conoid head, 

 whose truncate apex bears three (?) obscure lips without conspicuous papiUae. There 

 are no eyes, and no lateral organs were seen. The cylindroid pharynx is on the 



