1862. ] DR. BAIRD ON TWO NEW CESTOID WORMS. 2] 
circlet or corona of hooklets round the mouth, with the distinetly 
formed segments of the lower extremity of the body (unfortunately 
not represented in the plate), compel me to refer it, for the present 
at least, to that genus. I am not aware of any Cestoid Worm having 
been described which presents anything like the form of this curious 
parasite : and I have been very much assisted by the intelligent aid 
of the draughtsman, Mr. Jennens, who executed the accompanying 
plate, in making out the anatomy of its head and mouth. 
This parasitic Worm was taken from the rejectamenta either of 
the stomach or intestines of a Puma which lately died in the Gardens 
of the Society in Regent’s Park. 
Hab. Stomach? or intestines? of the Puma (Felis concolor). 
Mus. Brit. 
2. Tania semiteres. (PI. II. figs. 8-12.) 
Head rounded; neck and body continuous, the former differing 
only slightly in circumference from the head. The whole body of 
the Worm is very rigid, and the greater portion of it is cylindrical 
in shape, only the last third of its length becoming flattened and 
» slightly larger than the upper two-thirds. The first segments or 
joints are very narrow, gradually becoming a little broader and losing 
their rounded form. The last ten or eleven joints exhibit the genital 
orifices irregularly alternate—at first two or three occurring on the 
same side, then two or three on the opposite side, and the last three 
or four regularly alternate. The lower edges of the upper articula- 
tions are somewhat vandyked or scolloped (fig. 11). The neck is 
not distinguishable from the body. The head (fig. 9) is rounded, 
and the four bothria or suckers are circular in shape. The mouth is 
also circular, and is beset with a crown or circlet of pretty strong 
amber-coloured hooklets, curved inwardly (fig. 10). 
This is ‘an anomalous-looking Ténia, the body being rigid and 
hard, and for the greater portion of its length quite cylindrical. 
Length about 42 inches, breadth of apper portion ia line, middle 
of lower portion 1 line. 
For this species we are indebted to Mr. Baker, of the British 
Museum, who took it from a Persian Cat. It was alive when he 
first found it. 
Hab. Stomach of the Feiis catus, var. persica. 
Mus. Brit. 
EXPLANATION OF PLATE II. 
Figs. 1-7. Tenia ammonitiformis. 1. Nat. size. 2. Ditto, partially unrolled. 
3. Portion of body magnified. 4. Ditto, still more highly magnified. 
5,6. Head. 7. Circlet of hooks round the mouth. 
Figs. 8-12. Tenia semiteres. 8. Nat. size. 9. Head. 10. Mouth and circlet 
of hooklets. 11,12. Portions of upper and lower part of body magnified. 
