560 
SOME CESTODES FROM JAPANESE SELACHIANS. 
INCLUDING FIVE NEW SPECIES. 
By Prof. SADAO YOSHIDA. 
{Pathological Department of Osaha Medical Academy.) 
(With Plate XXIII and 4 Text-figs.) 
CONTENTS. 
PAGE 
Phyllobothrium lacttica van Beneden 1850 .... 560 
Crossobothrium angualum (Linton 1889) ..... 563 
Orygmatobothrium velamentum n.sp ..... 566 
Acanthobothrium coronatum (Rud., 1819) van Beneden 1849 . 571 
„ ijimai n.sp. ....... 573 
Galliobothrium Mchrechtii (van Beneden 1849) . . . 575 
„ verticillatum (Rud., 1819) van Beneden 1850 , 576 
„ convolutum n.sp. . . . . . . 578 
., nodosum n.sp. . . . . . . . 585 
Rhynchobothrium laciniatum n.sp. ...... 588 
Several years ago I collected cestodes parasitic in Selachians found 
in .Japanese waters. Most of them were mature and well preserved. 
The specimens are referable to ten species, of which five belong to 
known species and five are new to science. Since the published 
descriptions of the known species are not entirely in accord with my 
observations, and some of the species are not satisfactorily described 
anatomically, I shall re-describe the known forms briefly in the 
following pages. 
1. Phyllobothrium lactuca van Beneden, 1850 
Numerous specimens were obtained 10. v. 1911, from the spiral 
valve of Cynias manazo (Bleeker) caught near Hiroshima. They 
were found associated with some other cestodes, one of which I describe 
as a new species. 
External character. Length 60—80 mm. Head subglobular. 
