403] PSEUDOPHYLLIDEA FROM FISHES— COOPER 115 



Specific diagnosis: With the characters of the genus. Large cestodes up 

 to 540mni. long by 2 to 3 wide. Scolex small, elongate, but usually found 

 contracted to an almost spherical shape; 0.5 to 1.5mm. long by 0.3 to 0.5 wide 

 at the middle. Prominent terminal disc. First segments thick, short and 

 crowded; middle, oblong; posterior, or ripe proglottides, usually 2mm. broad 

 by 0.5 to 0.7 long, often quadrate, arranged in groups of two, between which 

 the transverse furrow is not prominent; other transverse furrows well marked. 



Cuticula 1 to 2jLi thick. Calcareous bodies very scarce. Main longitudinal 

 muscles not in bundles. Four to six chief longitudinal excretory vessels. 



No genital papilla; genital cloaca funnel-shaped, midway between anterior 

 and posterior borders of the proglottis. Vagina opens immediately behind 

 the cirrus-sac; no separation between common cloaca and hermaphroditic 

 duct. 



Testes large, subspherical, averaging 58/i long, 64 wide and 60 deep; 50 

 to 60 for each proglottis. Coils of vas deferens loose, close behind uterus-sac, 

 0.35mm. wide by 0.07 long. Cirrus-pouch ellipsoidal, 127 to 145^ deep by 

 81 to 104 in diameter, thin-walled. 



Ovary compact, 0.45 to 0.55mm. in width, 0.055 in length and 0.18 in 

 depth; isthmus quite thick, ventral. Oocapt 30/z in diameter. Vitelline 

 folHcles not separated into two fields on either surface, 450 to 720 in number, 

 45, 80 and 85ju in length, width and depth, respectively; vitelline reservoir 

 large, 175 by 65jli. Shell-gland posterodorsal, alternating irregularly from 

 right to left opposite the vas deferens. Uterine duct quite volummous, be- 

 tween ovary and uterus-sac. Uterus-sac transversely elongate, occupying 

 one-third or more of the transverse diameter of the proglottis, usually larger 

 towards the side bearing the opening; openings form a zig-sag ventral row. 



Egg, 58 to 63/Li long by 37 to 40 ^vide, without opercula; light in color, show 

 only faintly thru the body-wall. 



Habitat: In the pyloric portion of the intestine of the host. 



