458 Mr. H. A. Baylis on new 
being quite rounded and the anus situated at only 0°23 mm. 
from the extremity. The thickness at the anus is 0°55 mm. 
The lips (fig. 1) are large and roughly hexagonal in 
outline. There are three small interlabia (fig. 1, 7.Z.). As 
seen from the front, each lip has two sharp projecting longi- 
tudinal ridges internally, with an indentation between them. 
Dentigerous ridges (fig. 1, D.R.) are well developed on the 
inner surface of the lips.) The “pulp” of each lip is pro- 
duced anteriorly into two large rounded lobes. The ventro- 
lateral lips have each a pair of very slightly raised papille 
(fig. 1, P.) ; the dorsal lip apparently has none. 
Fig. 1. 
Ascaris colura; the head, seen from the dorsal side. 
D.L., dorsal lip; D.R., dentigerous ridges; L.L., interlabium ; 
P., papilla of ventro-lateral lip. 
The cesophagus is slender and of nearly uniform thickness 
throughout. Its length is about 7 mm. From the point 
where it enters the chyle-intestine a long intestinal diver- 
ticulum runs forward to about 1°6 mm. from the anterior end. 
There is apparently no cesophageal appendage. 
The vulva is situated at about 17 mm. from the anterior 
end. ‘The two uterine branches run backwards parallel to 
each other. The coils of the ovaries extend back almost to 
the posterior end of the body. The eggs are oval and have 
