Coss—Nematodes, mostly Australian and Fyzan. 303 
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. 
HTab.—Common on grass, Sydney, N.S.W., Australia. 
. 40 
. 2" 1l- 10° —55- 70° : C 
2. A. longicaudatus, n.sp.  f-a-iss ss 8™m. «= Cuticle apparently without 
markings; hairs none; neck conoid; cephalic setee none; head truncate, the lip- 
region transparent; lips obscure, probably six; spear acute, slender, with incon- 
spicuous posterior ending; cesophagus 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. 77—-3—3——se-7 37mm. 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 Pl. xu. 
Ffab.—Soil about banana plants, Fiji, July, 1891. Not common. 
3. A. minor, n.sp. oe eee 48mm. Cuticle naked as usual, and with very 
fine markings, if any. The conoid neck ends in a truncate head with a definite 
hp-region. I am uncertain about the details of the pharynx. The prolate bulb 
contains a distinct valvular structure. The cesophageal 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. xxxvut. 
Hab.—Found about the roots of banana plants, Fiji. 
