16 PROCEEDINGS OF THE iSTATIONAL MUSEUM vol. 75 



G&i^caria unknown or unrecognized. 



Hosts. — Primary, birds {Anhinga anhinga) ; secondary, unknown. 



Location. — Portal vein. 



Distribution. — North America (United States (Texas)). 



Type specimen. — United States National Museum Helminthological 

 Collections No. 27887, collected by the \Yriter, April 8, 1922, at Bryan, 

 Tex. 



This trematode is probably more closely related to species of the 

 genus Schistosomatiurih than those of an}^ of the other genera. The 

 union of the intestinal ceca near the posterior end of the body is 

 similar to that in *y. pathlocopticwnh; in P. anhingae, however, the 

 ceca do not have lateral diverticula, the ovary is more posterior, and 

 the distribution of the vitelline follicles is very different from that 

 in S. pathlocopticuin. In view of these differences the writer has 

 tentatively proposed the new genus Faraschistoso'rnatiuvi to include 

 this species. 



Genus AUSTROBILHARZIA Johnston, 1917 



Genenc diagnosis. — Schistosominae : Male shorter than female. 

 Gynaecophoric canal extends from posterior edge of acetabulum to 

 posterior end of body. Suckers well developed and prominent. 

 Esophagus bifurcates in front of acetabulum; intestinal ceca unite 

 caudally in the posterior fourth of body and may show several anas- 

 tomoses before the final union; common cecum short. Testes 18 to 

 20 in number, situated between the ceca, originating anteriorly a 

 short distance caudad of acetabulum and extending to equator of 

 body. Genital pore situated caudad of acetabulum, a little to the 

 left of median line. Cirrus pouch present, enclosing the seminal 

 vesicle and prostate. Female slender, the anterior portion thread- 

 like and the posterior portion flattened. Oral sucker not developed, 

 acetabulum present. Ovary long and loosely spiral. Vitellaria well 

 developed and occupying the region behind the ovar3^ 



Type species. — Austrohilhm'zia terrigalensis Johnston, 1917. 



AUSTROBILHARZIA TERRIGALENSIS Johnston, 1917 

 Figure 36 



/Specific diagnosis. — Austrohilhm'zia: 



Male 3.5 to 4 mm. long by 400;a wide dorsoventrally. Cuticle smooth. 

 Suckers about equal in size, 175/x, in diameter; acetabulum peduncu- 

 lated and lined with fine spines. Intestinal ceca provided with small 

 diverticula; in the posterior third of the body the ceca are united b}^ 

 commissures, forming two loops which are separated by a short stem; 

 common cecum short and terminating near posterior end of body. 

 Testes 18 to 20 in number, symmetrically placed between the intesti- 

 nal ceca, originating about 200/x caudad of genital pore and extending 



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