ART. 13 TREMATODE PARASITES OP MARINE MAMMALS PRICE 45 



uterine coils transverse, regular, pretesticular. Eggs sn;iall and 

 provided with a long filament at each pole. Parasites of birds and 

 mammals. 



Type genus. — Notocotylus Diesing, 1839. 



Subfamily Ogmogasterinae Kossack, 1911 



Subfamily diagnosis. — Notocotylidae : Ventral surface of body pro- 

 vided with longitudinal ridges or rugae. Uterine coils extend 

 anteriorly beyond base of cirrus pouch. Parasites of cetaceans and 

 pinnipeds. 



Type genus. — Ogmogaster Jagerskiold, 1891. 



Genus OGMOGASTER Jagerskiold, 1891 



Generic diagnosis. — Ogmogasterinae: Body oval, flattened, and 

 leaf like, margins fluted ; ventral surface provided with longitudinal 

 ribs or rugae. Oral sucker terminal; esophagus short; intestinal 

 ceca slender and extending to posterior end of body. Genital aper- 

 ture median, a short distance caudad of oral sucker; cirrus and 

 vagina open into a short genital sinus. Cirrus pouch long, situated 

 in median line and extending posteriorly to near equator of body; 

 testes deeply lobed, situated in the same transverse plane in the 

 posterior fourth of body. Ovary lobed, median in position and sit- 

 uated at the level of the posterior margin of testes; Mehlis's gland 

 median, preovarial; Laurer's canal present; vitellaria lateral, con- 

 sisting of isolated follicles and extending from anterior margin of 

 testes to level of the base of the cirrus pouch; uterus greatly con- 

 voluted, the coils extending laterally beyond intestinal ceca. Para- 

 sites of cetaceans and pinnipeds. 



Type species. — Ogmogaster plicatus (Creplin, 1829) Jagerskiold, 

 1891. 



OGMOGASTER PLICATUS (Creplin, 1829) Jagerskiold, 1891 



Plate 12, Figure 52 



Synonym. — Monostomum plicatum Creplin, 1829, pp. 878-880. 



Desa^iption. — Ogmogaster: Body oval, 6 mm to 14 mm long by an 

 average width of 4 mm, flat and leaf like; the margins of the body 

 have a fluted or pleated appearance, and the ventral surface is pro- 

 vided with 15 to 17 longitudinal rugae. Oral sucker terminal, 500/x 

 in diameter, according to Leiper and Atkinson (1915) ; esophagus 

 short; intestinal ceca sinuous and terminating near the posterior 

 end of the body. Excretory pore dorsal, about 700/* from the 

 posterior end of body, according to Jagerskiold; excretory vesicle 



