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distinguish the three main parts in transverse sections. The 
pharynx is provided with dilatores (fig. 6 di) which extend between 
the pharynx and the inner walls of the pharyngeal tube. The front 
pårt seéms to have only two dilatores, the hindmost part six. Å 
longitudinal section shows å number of about twenty dilatores. Cir- 
cular constrictores extend from one keel to the other (fig. 6 c1). 
The oesophagus penetrates the brain (fig. 2) and is then directed 
upwards and backwards running between the two coéca of the intestine 
before discharging into it. The walls of the oesophagus åre folded 
and provided with constrictores. I have fit seen dilatores. The 
quality of the food which segnis to be solid, ås well as the structure 
of the mouth make it evident that the pharynx must not be regarded 
as a sucking-organ. 
The intestine which fills the main part of the abdomen, has a 
comparatively complicated strueture which I have not been able to 
understand in details, as my material was badly preserved both for 
sections and dissections. The intestine 'can be divided into three 
parts. ,,The ventricle" (fig. 2, 3, 11 and 12 ve) is a large såc, 
filing a great part of the abdomen,. it is continued into a lateral 
narrow ,, small intestine" (fig. 2 & 12 j) of the same histological 
structure. — The latter is enlarged behind and fuses with the 
»Colon" (fig. 2 & fig. 12 co) in front continued into a large coecum 
and behind into the rectum (fig. 3 're) or anal gut, communicating 
with the vent. 
The ventricle is a spacious hollow sac whick seems to have 
no coeca with the exception of a short one on eåch side of the 
oesophagus. The inner surface, chiefly in the front part, has some- 
times well developed folds in the lumen. Tt is difficult to discern 
the cells from each other, chiefly in front, where the nuclei have 
disappeared more or less, mo doubt on account of bad preservation. 
The cells are of different height, ås seen in the sections (fig. 11); 
the proximal part of the cells is filled with small "grånules, the 
distal often with something which seems to be food in digestion. 
The cells of the hindmost part of the ventricle ånd those of the 
