'4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 7t 



vergent and pointed distally ; the A^entro-ventral rays appear smaller 

 than the latero-ventrals. It might be mentioned here that the present 

 description of the bursal rays is in accordance with Lundahl, who 

 writes (p. 284) : " Der Schwanzbeutel des Miinnchens aus zwei schief 

 stehenden, nach aussen konvexen Bliittern bestehend; ein jedes von 

 6 Rippen unterstiitzt. Von Diesen sind die 3 vorderen vorwarts 

 gebogen, die 3 hinteren stehen gerade nach aussen. Nur die vierte 

 und fiinfte gehen bis zum Rande des Beutels." The posterior lip of 

 the cloaca is provided with a pair of sessile papillae. The prebursal 

 papillae are very small. The brownish spicules have a length of 

 about 120/i, dividing distally to form one dorsal and two subventral 

 branches. 



Female 10 to 11.5 mm. long and 230/* to 240/ii wide. The club-shaped 

 esophagus has a length of 0.9 mm. and is surrounded by the nerve 

 ring at a distance of 250jli to 270/i. posterior to the head. The pos- 

 terior extremity of the body narrows suddenly behind the anus to 

 form a digitiform tail which has a length of IGOju, to 180ju,. The 

 vulva, a small transverse slit about 120jm long, opens at a distance of 

 about 2.5 mm. from the posterior end of the body. The ovejector has 

 two branches running parallel and anteriad. The intrauterine eggs 

 are oval, relatively thickshelled, and measure 85;u, to 90ju, by 45/x to 50/*. 

 The most developed ones are in the morula stage, with about 16 to 

 32 cells. 



Hosts. — Dafila acuta, Oidemia nigra., Mareca fenelo'pe^ Anas platy- 

 rhyncha, Anas platyrhyncha domestica, Anser alhifrons^ Querque- 

 dula cyanoptera. 



Location. — Under the cuticular layer of the gizzard. 



Life history. — Unknown. 



Distribution. — Europe (Sweden), Central Asia (Province of Syr- 

 Daria), Africa (Algeria), and United States of America. 



Specimens here described. — United States National Museum (Bu- 

 reau of Animal Industry Helminthological collection) No. 28964. 



EPOMIDIOSTOMUM CRAMI, new species 



Plate 1, Figures 1-3 ; Plate 2, Figures 7-10 



Specific diagnosis. — Epom/idiostomwni: Body slender and of a red- 

 dish-brown color in living specimens. It is considerably attenuated 

 anteriorly and terminates in a very small, but distinct, head. The 

 cuticle is transversely striated. Just behind the head the striations 

 are more highly developed and irregular, giving this region a very 

 characteristic wrinkled appearance. The postcervical papillae, sit- 

 uated about 390|U posterior to the head end, are inconspicuous. The 

 excretory pore opens ventrally at a distance of about 400/t to 410/t 

 from the anterior end of the body. 



