23 
three locules, in another specimen it is the lobe, situated ventrally 
to the lateral organ, that has three locules; there seems to be no 
fixed rule for that. The species is. easily recognizable on the band 
of minute, polygonal chitinous granules which is found immediately 
behind the cephalic mail. The species under consideration has this 
feature in common with the T. figuratum, but from this form it is 
distinguished by the faet that it has the above named cephalic con- 
striction which lacks entirely in T. figuratum. 
In the oesophageal region the cuticle is set with numerous papilli- 
form setæ, arranged in longitudinal rows. The lateral row only con- 
sists of a few setæ which are not so regularly arranged as those 
in the subdorsal and subventral rows. 
The two eyes each form a cyathiform pigment spot in which 
a lens has had its place. As there is no lens to be seen now it 
is to be supposed that it has been diluted by the preservation fluid 
or has disappeared in some other way. At any rate it is not un- 
common that preserved specimens of freeliving Nematodes prove 
to be deprived of their eye-lenses. The distance from the front end 
to the eyes is in a female of this species measuring 16,5 mm c. 
128 jii, and in a male, the length of which makes 15,2 mm, c. 120 ja. 
The lateral organ which is as usual situated immediately caudad 
to the single lateral cephalic bristle, is pear-shaped and measures 
in longitudinal diameter c. 9 ja. The lateral helds are in this species, 
as in most species of this genus, characterized by the large glan- 
dular cells, already observed and described by several investigators. 
In the species under consideration the lateral helds are, in some 
specimens, rather strongly pigmented with granules of a deep, 
brown colour; this pigment can locally be so dense that it hides 
the organs below and impedes the i.nvestigation. 
The oesophagus is rather long as in related species. It has its 
broadest width at the base and tapers evenly towards the front. 
The nerve ring is rather distinet; it is situated at the limit of 
about the hrst third of the oesophagus. 
The vulva is situated a considerable distance caudad to the 
middle. In a female, the length of which makes 13,8 mm, its place 
is 10,6 mm from the front end. It forms a large transverse slit. 
In some of the female species the surroundings of the vulva are 
covered with a layer of a granulated mass, probably the rests of 
