ART. IS THE TREMATODE FAMILY SCHISTOSOMIDAE PRICE 17 



to equator of body. Cirrus pouch moderately developed and enclos- 

 ing the seminal vesicle and prostate. Genital pore situated about 

 125/* caudad of the acetabulum and to the left of the median line. 

 The excretory system consists of a Y-shaped vesicle opening at the 

 extreme posterior end of the body, with two fine ciliated tubes given 

 off from the anterior limbs of the Y. 



Female 4.5 to 5 mm. long; anterior i)art of body slender, 2.G5 mm. 

 long by 58/A in diameter; posterior portion flattened, 1.85 mm. long 

 by 136/x wide. Oral sucker absent; acetabulum pedunculated, 35jli in 

 diameter. Oral opening ventral, 30/<, from the anterior end of body ; 

 esophagus 200/x long; intestinal ceca unite caudaliy at the union of 

 anterior and posterior parts of body; common cecum slender and 

 terminating near posterior end of body. Ovary spirally curved, 

 388jU, long when measured in a straight line, disregarding spiral 

 length, and situated at the union of anterior and posterior parts of 

 body. The oviduct extends forward and widens near its anterior 

 end to form the uterus which contains a single egg. The genital pore 

 is situated immediately behind and to one side of the acetabulum. 

 The vitellaria occupy the space from the distal pole of the ovary to 

 the posterior end of the body. Egg 32/a long by 2G/* wide. 



Cercmia unknown or unrecognized. 



Hosts. — Primary, birds {Hydrocoloeus )iovae-hoUan(liae = Laius 

 novae-hollandiae) ; secondary, unknown. 



Location. — Intestinal blood vessels. 



Distribution. — Australia (New South Wales). 



Genus ORNITHOBILHARZIA Odhner, 1912 



Synonym. — MacrohiJharzia Travassos, 1923, p. 18. 



Generic diagnosis. — Schistosominae : Female shorter than male. 

 Male with well developed gynaecophoric canal, formed by an infold- 

 ing of the lateral edges of the body. Suckers present. Cuticle covered 

 with spines. Digestive tract similar to that of Schistosoma; intes- 

 tinal ceca long and showing a tendency to form several anastomoses 

 before finally uniting to form the common cecum. Testes numerous 

 (GO or more), commencing a short distance caudad of acetabulum, 

 and extending into posterior half of body. Cirrus pouch rudi- 

 mentary or absent. Seminal vesicle free in the parenchyma ; prostate 

 absent. Genital pore small and situated immediately caudad of 

 acetabulum. Female elongate, slender, and flattened. Ovary elon- 

 gated, loosely or tightly coiled, and situated in anterior third of body. 

 Vitellaria extensive, occupying about two-thirds of body length. 

 Laurer's canal present (at least in some species). Uterus short and 

 containing but one egg at a time. 



Type species. — O rnithohilharzia intermedia Odhner, 1912. 

 3S87G— 29 3 



