54 Cobb — Nematodes, mostly Australian and Fijian. 



single median ventral papilla near the middle. The two linear acute spicula, 

 half as long as the tail, are so close together that when seen in profile they 

 appear as one. The proximal ends are not cephaloid. In front of the spicula is a 

 structure one-half as long as the spicula themselves, concerning whose function I am 

 uncertain. It may be accessory to the spicula, as it can be exserted at the same 

 time. The blind end of the testicle is sometimes reflexed, and in it commences the 

 development of the spermatozoa, which are arranged in single file through the organ, 



Hab. — Common on grass, Sydney, N.S.W., Australia. 



2. A. longicaudatus, n.sp. f'e "-9 ^\-i~%% Ti S""""- Cuticle apparently without 

 markings ; hairs none ; neck conoid ; cephalic setae none ; head truncate, the lip- 

 region transparent ; lips obscure, probably six ; spear acute, slender, with incon- 

 spicuous posterior ending ; oesophagus one-third to one-half as wide as the neck ; 

 bulb one-half to two-thirds as wide as the neck, twice as long as wide, or more, with 

 a refracting chitinous central part ; tail conical, in its posterior half setaceous ; vulva 

 inconspicuous ; uterus with possibly a rudimentary posterior branch ; eggs twice as 

 long as the body is wide and one-third as wide as long, probably deposited before 

 segmentation begins, i « ^2- \ ""e ^i- ■^^'™- The male tail is like that of the female 

 in form. There is no bursa or papilla or supplementary organ of any kind. The 

 arcuate-cuneiform spicula are a little longer than the anal body-diameter, their 

 proximal ends not being cephaloid. There is a chitinous structure in front of the 

 spicula, possibly the chitinous terminal portion of the combined rectum and sexual 

 opening, which is half as long as the spicula and expanded proximally much as in 

 A. microlaimus. Figured on PI. vii. 



Hab. — Soil about banana plants, Fiji, July, 1891. Not common. 



3. A. minor, n.sp. -s ? ^2-9 ~^2-8 ^I's ^S"™- Cuticle naked as usual, and with veiy 

 fine markings, if any. The conoid neck ends in a truncate head with a definite 

 lip-region. I am uncertain about the details of the pharynx. The prolate bulb 

 contains a distinct valvular structure. The oesophageal tube is heavily lined with 

 chitin. The intestine is coarsely granular. The ventral pore is situated somewhat 

 behind the sucking-bulb. The conoid tail ends in what appears to be a conical outlet 

 for the secretions of the caudal glands. The vulva is inconspicuous. The eggs are 

 one-half as wide as the body and over twice as long as wide. Figured on PI. iii. 



Hab. — Found about the roots of banana plants, Fiji. 



