S. Yoshida 
591 
base ♦of the pouch, then runs straight (broadening, especially distally) 
outward to the exterior; deep genital cloaca absent; muscular wall of 
duct uniformly thick. 
Ovary voluminous, situated in middle region of segment, extending 
dorso-ventrally to occupy the whole thickness of medullary field; 
divided into two lobes, right and left. Yolk glands numerous, arranged 
in circular row between the cortical and medullary fields. 
Diagnosis. Length 100 mm. or a little more. Head provided 
with two bothridia, measuring 0-33 x 0-27 mm. Neck tolerably long. 
Proboscis sac spindle shaped, 0-5 x 0-2 mm. Strobila slender and 
delicate anteriorly, thick in the middle and behind. Segments always 
longer than broad; their posterior border with six triangular charac¬ 
teristic flaps, which gradually enlarge toward the middle of body, and 
thence decrease in size posteriorly. Genital openings lateral, irregu¬ 
larly alternate. 
Host. Cynias manazo (Bleeker), spiral valve. 
REFERENCES. 
Beauchamt* (1905). Ftudes sur les Cestodes des Selachiens. Arch, de Parasitol. 
IX. No. 4. 
Braun, M. (1890-1900). Bronns, Klassen und Ordnungcn des Tierreiches. iv. 
Vermes. Abt. I.b, Cestodes. 
Curtis, W. C. (1903). Crossobothrium laciniatum and development stimuli in the 
Cestoda. Biol. Bullet. Marine Biol. Laboratory, Woods Holl, Mass. 
Johnstone, Jas. (1906—1910). Fourteenth, Fifteenth and Eighteenth Annual 
Reports, Lancashire Sea Fisheries Laboratory. Trans. lAverpool Biolog. Soc. 
VON Linstow (1878-1889). Kompendium der Helminthologie. Nachtrag. 
Linton, E. (1889). Notes on entozoa of marine fishes of New England with descrip¬ 
tion of several new snecies. Annual Rep. Commissioner of Fish and Fisheries 
for 1886. 
- The same. Part II. The Annual Report...for 1887. 
- (1901). Parasites of the fishes of the Woods Holl region. U.S. Fish Com¬ 
mission Bulletin for 1899. 
PiNTNER, Th. (1889). Neue Untersuchungen fiber den Bau des Bandwurmkorpers. 
I. Arh. a. d. zool. Inst. Wien. vm. Ht. 3. 
- (1913). Vorarbeiten zu einer Monographic der Tetrarhynchoiden. Stzber. 
d. K. K. Akadem. IFtss. Wien. cxxn. 
Shipley, A. (1900). In Willey’s Zoological Results, part v. 
Shipley, A. and Hornell, J. (1904, 1905, 1906). In Herdman’s Ceylon Reports. 
Parts n, m and v. 
Southwell, T. (1911). Description of nine new species of cestode parasites, includ¬ 
ing two new genera from marine fishes of Ceylon. Ceylon Marine Biol. Reports. 
Part V, 
