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XLI. Description of a new species of Tape-worm, Tenia lamelligera, Owen. By Ricuarp 
Owen, Esq., #.R.S.& Z.S., Assistant Conservator of the Museum of the Royal College 
of Surgeons in London. 
Communicated June 9, 1835. 
Tuis species has hitherto been found only in the small intestines of the Flamingo, 
Phenicopterus ruber, Linn., and is of a larger size than the Tenie of Birds usually are, 
being 7 inches in length, 5 lines in width, and 1 line in thickness. Two specimens 
were found by Lieut.-Colonel Sykes, F.R.S., in a Flamingo dissected by him, situated 
in the duodenum, so as almost completely to block up that intestine. The following 
description is taken from these specimens. The segments are extremely short and nu- 
merous ; they gradually increase in breadth and thickness for about 3 inches from the 
head ; as they approach the opposite end of the body they slightly diminish in breadth, 
and while they increase a little in length, retain the same thickness. 
Along the middle of both the plane surfaces of the body the segments are separated 
by shallow indentations only, but at the sides the posterior margins of the segments 
project abruptly from the surface, and form a series of semicircular ridges, commencing 
about a line’s distance from the margin on one side, and extending round to the same 
distance on the opposite side. 
On both margins of each segment, immediately anterior to these ridges, there is a 
small pyramidal eminence, perforated at the apex, through which perforation a small 
cylindrical process or cirrus can be protruded. 
A longitudinal line is slightly impressed along the middle of both surfaces of the 
body ; it is most distinct on the anterior half. A few segments at the posterior ex- 
tremity of the body were partially separated from the rest, and seemed about to be 
detached. In these alone were ova perceptible, which were aggregated near the base 
of the cirrus, but not confined in an ovary of any definite form: the sides of the canal 
which they were about to traverse were evidently glandular, and the ova are probably 
fecundated as they pass through. The cirrus would seem to be an exciting organ. 
The segments at the anterior part of the body are so short that they resemble mere 
transverse rug@ ; at the posterior end of the body they did not exceed half a line in 
length. 
The dilated margins of the segments and the projecting cirri occasion in this Tenia 
a superficial resemblance to the Nereis lamelligera of Pallas, and peculiarly distinguish 
it from any species hitherto described. It may be characterized as follows. 
