20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. SI 



Genus ODHNERIELLA Skrjabin, 1915 



Generic diagnosis. — CamjDulinae : Body fiat and ribbonlike ; cuticle 

 of preacetabular part of body armed with spines. Oral sucker 

 slightly smaller than acetabulum. Digestive tract without anteriorly 

 directed ceca. Excretory vesicle as in Canipula. Cirrus pouch sac- 

 like, extending beyond posterior margin of acetabulum ; cirrus armed 

 with spines as in Orthosplanchnus ; testes entire. Ovary entire, pre- 

 testicular. Vitellaria consisting of grapelike masses of follicles, sit- 

 uated laterall}^ and not invading median field, and extending from 

 about midw^ay between ovary and acetabulum to level of termination 

 of ceca. Uterus relatively short; vagina unarmed. Eggs triangu- 

 lar in cross section. Parasites of pinnipeds. 



Type species. — Odhneriella rossica Skrjabin, 1915. ■ 



ODHNERIELLA ROSSICA Skrjabin, 1915 

 Plate 5, Figure 22 



Description. — Odhneriella: Body flat and ribbonlike, 9 mm long 

 by 760/x wide at acetabulum ; sides of body almost parallel. Cuticle 

 of preacetabular part of body armed with spines. Oral sucker di- 

 rected ventrally, 500ja long by 480/1, to 530/*, wide; acetabulum 500/j. 

 long by 680/1 wide, slightly elevated above surface of body, and sit- 

 uated in anterior part of body. Prepharynx 119/t long; pharynx 

 325/t long by 290/i wide; esophagus 230/t long; intestinal ceca simple 

 and extending to po.sterior end of body; anteriorly directed ceca, 

 characteristic of other members of the subfamily, absent. Excretory 

 pore terminal; excretory vesicle as in other members of the sub- 

 family. Genital pore median, near anterior margin of acetabulum. 

 Cirrus pouch saclike, extending beyond posterior margin of acetab- 

 ulum; cirrus strong and armed with spines. Testes oval, 935/i long 

 by 390/1 wide, entire, tandem in position, and situated in the posterior 

 fourth of the anterior half of the body. Ovary globular, 300/i, to 

 340/1 in diameter, pretesticular. Vitellaria consisting of grapelike 

 masses of follicles distributed along sides of body and extending 

 from about midway between ovary and acetabulum to level of ends 

 of ceca. Uterus short, with few coils, situated in the intercecal field 

 between ovary and acetabulum; vagina straight and unarmed. 

 Eggs oval, 100/t long by 60/* wide, thickened at posterior pole, tri- 

 angular in cross section. 



Host. — Odohenus rosmarus. 



Location. — Bile ducts. 



Distribution. — Europe (Russia). 



