Apr. 15, 1925 
Ascaridia lineata, a Parasite of Chickens 
767 
various workers for Ascaridia lineata. 
The different variations as regards the 
first ventral and second lateral papillae 
which have been referred to elsewhere 
in this paper were also encountered. 
The number of papillae on the tail of 
the male was found to be 10, the first 
i/iomm. 
Fig, 9 .—Ascaridia lineata (original) from the goose. 
an., anus; s., sucker; sp., spicules 
group consisting of 3 pairs (ventral) 
arranged in a linear series on each 
side of the sucker, the second group 
consisting of 4 pairs (3 lateral and 1 
ventral), and the last group consisting 
of 3 pairs (2 lateral and 1 ventral), 
(figs. 10, 11, 12, 13.) 
VARIATIONS IN ASCARIDIA LINEATA 
Head. —The head varies in size cor¬ 
responding to different sized specimens. 
The two subventral lips are practically 
equal in size, while the dorsal lip is 
somewhat larger. As has already been 
stated, Schneider (13) described two 
dentigerous ridges, the second one, ac¬ 
cording to this worker, being very small. 
Lane (5) refers to only one ridge which 
Fig. 10 .—Ascaridia lineata (original) from the 
chicken, an., anus; s., sucker; sp., spicules 
he states has the appearance of a wavy 
line when viewed from certain aspects. 
The present writer observed a rather 
prominent dentigerous ridge, contain¬ 
ing distinct teeth, but failed to make 
out a second smaller dental plate re¬ 
ferred to by Schneider. Each lip bears 
two papillae, these having been also 
observed by Lane (5). No interlabia 
are present. 
Oesophagus. —In adult specimens 
the oesophagus is 3 mm. to 4 mm. long, 
club shaped, and about 0.35 mm. in 
