398 AUSTRALIAN FREE-LIVING MARINE NEMATODES, 



posteriorly in a prolate bulb more than half as wide as the base 

 of the neck and containing a distinct chitinous valvular structure. 

 A distinct but not deep constriction separates the oesophagus from 

 the intestine, which is granular and greenish in colour and more than 

 half as wide as the body. The cardia is more than half as long 

 as the bulb. The rectum, which is equal in length to the anal 

 body-diameter, is suddenly contracted &t the middle; the pyloric 

 collum is distinct. The narrow and tortuous chitinous duct of 

 the ventral gland ends in a ventral pore just behind the nerve- 

 ring. The distance between the wings of the cuticle is equal to 

 one-third the width of the body. The conoid tail ends in a blunt 

 apiculate terminus, the outlet for the secretion of the three caudal 

 glands whose three ducts are plainly visible in the posterior part 

 of the tail. The inconspicuous vulva leads to a broadly conical 

 vagina one-third as long as the body is wide. The thin-shelled 

 eggs are half as wide as the body and one and one-half times as 

 long as wide. The ovaries reach three-fourths the distance back 

 to the vulva. The eggs are deposited before segmentation begins. 

 On culms of grass and among the blanched parts of celery, 

 Sydney, New South Wales, Australia; abundant. 



^ 1-5 11-8 21-5 '49'"^ 89-6 i.n„„„ -r •, , 



p. AGiLiOR, n.sp. i^i — 3^ 3^4 ^ Pg ^ i* mm. Like the pre- 

 ceding species, but narrower, and having the anterior chamber 

 of the pharynx so divided that its narrower posterior part is twice 

 as long as the anterior wider part. In all other respects almost 

 e.x:actly the same. 



Found with the preceding on grass, these being the only non- 

 marine species here described. 



Cyatholaimus, Bastian. 



-, -1 6-7 12-2 M 87- „, 



Cyatholaimus trichurus, n.sp. 1-2 2-6 — 2-9 3-2 — ¥1 2'6mm. 



The cuticle of this species, as is the case with all Gyaiholaimi, 

 is traversed by transverse strite composed of dots ; on our 

 present worm these striae are from 2- to 2 -5^ apart, being 

 somewhat closer together anteriorly than posteriorly. The dots 

 also are about 2'/x apart. In the lateral regions these dots 



