H. A. Baylis 
367 
tail is bordered by membranous lateral alae (A.), forming a three-lobed 
bursa, which, when the tail is curled ventrally in the usual manner, 
becomes a cup-shaped hollow. The tail-papillae are arranged in 
essentially the pattern described by Krabbe and by Stiles and Hassall. 
In the single male example available, however, I have been unable to 
distinguish the three symmetrically arranged pairs of papillae imme¬ 
diately behind the anus. An irregular row of about 60 papillae extends 
forward along the lateral ridge on each side, to a distance of 6-7 mm. 
from the tip of the tail. The spicules ( S .) are tubular, about 2 mm. in 
length and slightly expanded at their proximal ends. 
In the female, the anus is situated in a transverse fold of the cuticle 
at about 0-3 mm. from the tip of the tail. The latter (PL XV, fig. 1) 
is blunt, and shows a little indentation (0-1 mm.) of the cuticle at the 
extreme tip, but there is no styliform process embedded in the cuticle, 
as stated by von Linstow. The vulva, in an example 70 mm. long, 
is situated at 26 mm. from the anterior end. The uterus (PI. XVI, 
fig. 4, TJt.) in the same specimen, measures altogether 38 mm. in length. 
Its undivided anterior portion, i.e. from the vulva to the point of 
division into the two posterior horns, measures 24 mm., while the horns 
measure 14 mm. The whole organ is nearly straight and without 
convolutions, except near the vulva. 
As in the case of the larval form, so again in the adult, the alimentary 
canal (PI. XIV, fig. 4) affords very useful specific characters; and the 
correspondence between the young and adult forms in this respect, 
except with regard to the relative sizes of the several parts of the 
digestive apparatus, is most complete and satisfactory. 
The oesophagus shows the same division into two portions, an anterior 
muscular part (the oesophagus proper), and a posterior part with 
thickened, opaque, granular walls. The former measures 3-6-3-8 mm. 
in length, the latter about 1-35 mm. These measurements are in accord¬ 
ance with what might be expected from those of the same organs in the 
larval forms. The two parts of the oesophagus have increased slightly 
in length, but not proportionately to the general growth of the body. 
The posterior portion is bent so as to open into the intestine almost 
at a right angle. 
There is an anterior caecal prolongation of the chyle-intestine, 
exactly similar to that seen in the larvae; it has now, however, increased 
considerably in length, so that it is about J as long again as the second 
portion of the oesophagus, and projects some little distance in front of 
it (PI. XIV, fig. 4, C.). Its extremity is attached by a ligament to the 
