Volume VIII 
JUNE, 1916 
No. 4 
A TRI-RADIATE TAPEWORM (ANOPLOCEPHALA 
PERFOLIATA GOEZE) FROM THE HORSE. 
By F. J. MEGGITT, M.Sc., 
Board of Agriculture and Fisheries Research Scholar, 
University of Birmingham. 
(With Plate XVIII and 2 Text-figures.) 
Introduction. 
While fixing a number of tapeworms ( Anoplocephala perfoliata 
Goeze) from the small intestine of the horse, I came across a small 
tri-radiate specimen. This abnormality has previously been described 
by Neumann ( 2 ), but only briefly, and without any account of the 
internal anatomy. It therefore seemed advisable to compile a short 
account of the most salient characteristics. For the material I am 
indebted to Dr C. L. Boulenger, Helminthologist of this Department. 
I have also to thank Professor L. G. Neumann for obtaining for me a 
copy of his paper. 
The horse from which the material was obtained had died from the 
cumulative effects of numerous parasites. On opening the small 
intestine at the post-mortem, it was found to be almost entirely filled 
with huge masses of the tapeworms. Only a comparatively small 
number were taken for subsequent fixing and examination, and it was 
amongst this number that the tri-radiate form was found. A close 
examination of the remaining tapeworms would no doubt have revealed 
other cases. A complete biography of all poly-radiate Cestodes hitherto 
described is given by Foster (l). 
External Characters. 
The total length of the specimen was 33 mm.; its maximum width 
was 6 mm., and its posterior width 3-8 mm. The number of proglot¬ 
tides was approximately 100. The shape of the scolex and proglottides 
Parasitology vm 25 
