ART. 13 TEEMATODE PARASITES OF MARINE MAMMALS PRICE 41 



large and pedunculated; Laurer's canal present. Vitellaria and 

 Mehlis's gland not yet developed. The uterus passes posteriorly 

 between the testes and then extends anteriorly to the genital pore. 



Host. — DelfMnu^ delphis. 



Location. — Intestine. 



Distribution. — Europe. 



Remarks. — The specimens upon which Poirier (1886) based the 

 description of the foregoing species were still encysted, the cysts 

 being free in the intestine; they were described as spherical and 

 measured 1 mm in diameter. Looss (1899) referred this species to 

 the genus Asfla, which he later (1900) renamed Astiotrema. 

 Jiigerskiold (1908) pointed out that this form was similar to the 

 species G. laeteum^ which he had previously described from speci- 

 mens encj^sted in the brain of Cottus scorpius Bloch. Odhner 

 (1911) was of the opinion that this species was closely related to 

 G. lacteum^ and Bittner and Sprehn (1928) actually placed it in the 

 genus Galactosommii by making the combination of the generic with 

 the specific name. 



It seems extremely doubtful whether G. ennacewin is a parasite of 

 Del'phinus in view of the fact that all other members of the genus are 

 parasites of birds. This was pointed out by Jagerskiold (1908, p. 

 317), who states: " Wahrscheinlich ist der Delphin nicht der wirk- 

 liche Wirt, sondern die von Poirier gefunden Kapseln sind mit ir- 

 gendwelchen Fische in den Delphin hineingekommen. Der wirk- 

 liche Wirt, falls hier wirklich ein Galatosomum vorleight, ist da- 

 gegen wahrscheinlich ein fischfressender Meeresvogel." 



Family PARAMPHISTOMATIDAE Fischoeder, 1901 



Family diagnosis. — Medium-sized to large trematodes, with or 

 without ventral jDOuch. Cuticle without spines. Oral sucker termi- 

 nal or in some cases retracted into the body; with or without dorsal 

 pocketlike evaginations ; acetabulum at posterior end of body. 

 Pharynx absent; intestinal ceca spacious. Excretory vesicle saclike, 

 opening dorsally a short distance from posterior end of body. 

 Lymph system present. Genital opening ventral, in anterior part 

 of bod}^, with or without genital sucker; cirrus pouch present or 

 absent; testes relatively large, frequently lobed, usually cephalad 

 of ovary. Vitellaria usually well developed. Uterus dorsad of 

 testes. Eggs without filaments. Parasites of mammals, birds, fishes, 

 amphibians, and reptiles. 



Type geniis. — Paramphistomum Fischoeder, 1901. 



