Cobb — Nematodes, mostly Australian and Fijian. 45 



Hab. — Found among the bases of carrot leaves, Sydney, New South Wales, 

 Australia, in July, 



23 



7. D. domus Glauci, n.sp. i* ^4-1 ^-7 '^5.3 — r^ i-ssmm. Neck conoid, — convex-conoid 

 anteriorly ; lips six, each \vith at least one distinct papilla ; spear acute, well 

 developed ; oesophagus at first only one-fifth as wide as the corresponding part 

 of the neck, but gradually and uniformly widening until it is at last more than half 

 as wide as the base of the neck ; rectum nearly twice as long as the anal body- 

 diameter ; pre-rectum three times the length of the rectum, tapering posteriorly ; 

 ovaries reaching two-thirds to three-fourths the way back to the vulva ; eggs thick- 

 shelled, ellipsoidal, as long as the body is wide and over half as wide as long. 



Hab. — Found among moss on the walls of the Casa Poetse, Pompeii, Italy. 

 Possibly the widths given in the formula are too great. 



8. D. Vesuvianus, n.sp. i-i 3-2 3-6 ^ vi — 2^ 115 mm. In the posterior part the neck 

 is nearly cylindrical, but the anterior third is convex-conoid to the truncate head. 

 The Up-region is not conspicuous, and the lips are either absent or very indistinct. 

 There are perhaps two rows of papillae, six in each row. The spear is very slender 

 and can be traced backward only for a distance equalling one-fiftieth of the length of 

 the worm. The anterior part of the oesophagus is only about one-fourth as wide as 

 the corresponding part of the neck, but it expands suddenly behind the middle, so 

 that the posterior third (male) or two-fifths (female) is twice as wide, i.e., about half 

 as wide as the base of the neck. The intestine is about half as wide as the body and 

 is marked off from the oesophagus by a distinct constriction. The cardia is broad 

 but not deep. The rectum is only three-fourths as long as the anal body-diameter ; 

 the pre-rectal portion of the intestine, however, is quite as long as the enlarged portion 

 of the oesophagus. The lateral fields are nearly one-third as wide as the body. The 

 tail in either sex is hemispherical or conoid-hemispherical. The inconspicuous vulva 

 leads to a vagina half as long as the body is wide. The reflexed ovaries reach half- 

 way back to the vulva, il "7 ^l-2~i-5~ ^l-l i™"- A ventral row of eleven juxtaposed 

 median innervated papillae extends forward from opposite the proximal ends of the 

 spicula. These latter are of the usual form and about twice as long as the tail. The 

 internal male sexual organs occupy the posterior two-thirds of the body. 



//ab. — Found among moss on the sides of Mount Vesuvius, Italy. 



9. D. labyrinthostoma, n.sp. 1" I'-a ^2-2 '%-2 T2 I'sm"- This species belongs to the 

 group first made known through the researches of Dr. de Man, and characterised by 

 the possession of elaborate mouth parts accessory to the spear. The group represents 

 the acme of development in Dorylaimus so far as yet discovered. The spear presents 



