It 
to have a joint near their base. The Lame of (E. Hmmorrhoidalis 
and Ovis, and probably all those which feed on the mucous mem¬ 
branes lining the internal canals of the body, are also furnished 
with these tentacula ; whilst those Larvae which inhabit beneath 
the skins of various animals will be found universally without 
them, being confined in the capsule of the skin sufficiently secure. 
The body of this Larva (see fig. 6, Plate I.) is of a whitish red 
colour, and appears to be composed of eleven segments, sur¬ 
rounded with a double row of horny bristles, a longer and a 
shorter series, and placed alternately. The two last segments 
appear naked, or destitute of them. These spines are of a reddish 
colour, except the points, which are black, and are directed to¬ 
wards the tail or large end of the Larva ; they are longer below 
or on the belly of the Larva, than above or on the back, but are 
still longer at the sides. By means of these they probably regain 
their situation, if at any time they are detached from their hold, 
by forcing them against the surrounding membranes, and are 
assisted by the two crotchets or hooks at the head. I once met 
with some of these in the duodenum, close to the pylorus, hav¬ 
ing been carried perhaps into the intestines by some casualty, 
and could not again regain completely them situation in the 
* 
stomach. 
The aperture of the mouth appears surrounded with a promi¬ 
nent margin, and is irregular and harder than the rest of the 
skin ; but whether hard enough to masticate and feed on the vege¬ 
table matters in the stomach, may be a question. Their food is 
most probably the chyle, or, as it is in this state by some modern 
anatomists termed chyme, or an imperfect sort of chyle, which 
being nearly pure aliment, it is probable affords but little excre- 
mentitious residue. That it is the gastric chyle and not the 
vegetable matter that they feed upon, is also rendered probable 
from the support of the other species of this genus on puiely 
animal secretions, 
