Cobb — Nematodes, mostly Australian and Fijian. 1;9 



position of the excretory pore unknown ; two wings on the lateral field separated by 

 a distance equal to one-fourth the width of the body. The tail is conical, and is arcuate 

 in the anterior part. The anus is rather prominent. The two equal elongated- 

 cuneiform acute arcuate spicula slide in an accessory piece having a backward- 

 pointing somewhat hook-shaped process, which if straightened out and extended 

 forward would reach nearly to the proximse. The male papillae are finger-shaped 

 and are arranged as follows : 1, a sublateral pair as far in front of the proximal ends 

 of the spicula as the latter are, in front of the anus; 2, one submedian pair just in 

 front of the proximee ; 3, one subventral pair just in front of the anus ; 4, one 

 submedian pair as far behind the anus as the first pair mentioned above is in front 

 of it ; 5, and finally, a ventral post-anal group (two pairs V) twice as far from the 

 anus as those last mentioned. All these details, as well as many others, are set forth 

 on PI. IV. 



Hab. — On decaying outside sheaths of young banana plants, Fiji, July, 1891. 



3. D. monhysteroides, Biitschli. ? ; T %% T ■'""""• The neck diminishes more 

 rapidly than in filicaudatus ; it resembles that species, however, in the structure of 

 the pharynx, except that the pharynx of monhysteroides is somewhat narrower. The 

 female sexual organs are asymmetrical, there being, however, a posterior sterile 

 branch reaching nearly to the anus. 



ffab. — This species, which much resembles the filicaudatus of the same author, 

 was found with that species in cow-dung, Germany. 



4. D. minor, n.sp. i"? ^2-9 ^2-9 '^3-2 ^2- ■^""- N^o markings were observed on the 

 cuticle, which was without hairs as well. A three-lipped truncate head surmounts 

 the conoid neck. Each lip bears a setose papilla. The pharynx is about as deep as 

 the head is wide, and in its widest part is half as wide as the head ; the single large 

 acute dorsal tooth springs from the base of the pharynx and extends nearly half-way 

 to the mouth. The oesophagus does not expand to receive the pharynx but assumes 

 immediately a width three-fifths as great as the neck and so continues to the ellip- 

 soidal median bulb, which is three-fourths as wide as the neck ; behind the median 

 bulb the oesophagus is narrower, passing through the nerve-ring with a width one- 

 third as great as that of the neck but expanding finally to form a bulb somewhat 

 smaller than the median bulb. The intestine, which is separated from the oesophagus 

 by a distinct cardiac constriction, is rather coarsely granular, and ends in a rectum 

 having a length equal to that of the anal body-diameter. The conical tail is exces- 

 sively fine near its end. No caudal glands were seen. The reflexed part of the ovary 

 extends nearly half-way back to the inconspicuous vulva. The rather thick-shelled 

 eggs are a little more than twice as long as the body is wide, and one-third to 

 one-fourth as wide as long, being, therefore, of such a large size that the uterus will 



