420 
SCLEROSTOME PARASITES OF 
IN ENGLAND. 
THE 
HORSE 
I. THE GENERA TRIODONTOPHORUS AND OESOPHAGODONTUS. 
By CHARLES L. BOULENGER, M.A., D.Sc., 
Reader in Helminthology, University of Birmingham. 
[From the Research Laboratory in Agricultural Zoology, 
University of Birmingham,.) 
(With Plate XXII and 7 Text-figures.) 
CONTENTS 
PAGE 
Introduction .......... 420 
Triodontophorus . . . . . ■ ■ ■ ■ ■ 422 
Triodontophorus intermedius Sweet ..... 423 
Triodontophorus tenuicollis sp. n. . . . . . . 426 
Triodontophorus brevicauda sp. n. . . . . . 430 
Oesophagodontus robustus Giles ....... 433 
Introduction. 
Since the appearance in 1901 of Looss’ important monograph on 
the Sclerostomes of Horses and Donkeys in Egypt a much greater 
interest lias been shown in the presence of these and allied Nematodes 
in other parts of the world, but, although nearly fifteen years have 
elapsed since that publication, very little addition has been made to 
our knowledge of this branch of helminthology. 
