H. A. Baylis 
375 
cuticular bands do not appear to be marked with any finer striations. 
Lateral alae are absent; the lateral fields measure 0-15 mm. in width. 
A well-developed pair of neck-papillae is present at about 0-74 mm. 
from the anterior end. 
The lips (PI. XV, fig. 3) bear a very close resemblance to those of 
A. similis, but are of a slightly different shape. There is the same 
almost straight dorsal border to the basal portion of the dorsal lip, and 
a similar narrow, bilobed, anterior projection. The papillae at the outer 
angles of the dorsal lip are double, hke those of the ventro-lateral lips. 
The greatest breadth of the dorsal lip is 0-24 mm., that of the ventro¬ 
lateral lips 0-18 mm. The dentigerous ridges are simple. There are no 
interlabia. 
The oesophagus is, as in the preceding species, divided into two 
portions. The anterior portion is rather narrow, and about 4-5 mm. 
long. The posterior portion is usually very slender, not very granular, 
and measures rather more than 2 mm. in length. It is joined to the 
chyle-intestine by an oblique suture, and may be either perfectly straight 
or bent in a sigmoid manner. There is no trace of either oesophageal or 
intestinal caeca. 
The tail of the male (PI. XVII, fig. 3) is provided with a slight 
membranous expansion near the tip. In front of this it is expanded 
laterally and ventrally by a strong muscular ridge on either side, similar 
to that described above for A. decipiens. There are six pairs of postanal 
papillae. Those of the first pair, situated immediately behind the 
anus, are small. These are succeeded by a larger, more ventral pair. 
The third pair are large lateral papillae, projecting into the membranous 
alae. The fourth and sixth are rather smaller, and project laterally in 
a similar manner, while the fifth pair is situated a little more ventrally 
than the fourth and sixth. There is a pair of small papillae situated 
just laterally to the corners of the anal aperture, and in front of this a 
row of 50 to 60 papillae on either side of the body, beginning regularly 
just in front of the anus, but becoming very scattered more anteriorly. 
These papillae extend forwards to a distance of about 6 mm. from the 
posterior end. 
The spicules are very slender, and measure slightly less than 2 mm. 
in length. 
The tail of the female is short (0-3 mm.) and blunt, and has a blunt 
terminal papilla. The vulva is situated a little in front of the middle 
of the body (34 mm. from the anterior end in a specimen 79 mm. long). 
The unpaired portion of the uterus is extremely short, the division into 
