PEOCEEDINGS OF THE XATIO^TAE MUSEUM 



VOL. 76 



PARAr^ETORCHIS INTERMEDIUS, new species 



Specific diagnosis. — Parainet orchis: Body linguiform, the anterior 

 end attenuated and posterior end rounded, 3 to 3.5 mm. long by 1 mm. 

 wide in the region of the anterior testis. Oral sucker terminal, 155/,i 

 to 262;u, long bj' 232^ to 278/^ wide, weakly muscular. Prepliaryhx 

 absent ; pharynx strongly muscular, ITO/x to ISG^u, long by 140ju wide. 

 Esophagus very sliort; intestinal ceca wide and sinuous, terminating 

 TTfi to 124/x from the posterior end of body. Acetabulum weakly 

 developed, slightly oval transversely, 15(V long by 200/a wide, and 

 situated about 7T5/A to 99T/x from the anterior end. Testes deeply 

 lobed, tandem or slightly oblique, and situated in the posterior half 

 of body. The anterior testis is from 262/i, to 310^ long by 325;u to 496/* 

 wide and the posterior from 310/* to 500,u long by 387/* to 496/a wide. 

 Cirrus pouch absent. Seminal vesicle slender and sinuous, and usually 

 obscured by the convolutions of the uterus. Ovary trilobed, 108/* to 

 140/^ long by 200/* to 2G0/x wide, and situated a short distance in front 



r'iGURE 1. PARAMETORCHIS IN'TERMEDUS, NEW SPECIES. VJiNTRAL VIEW 



of the anterior testis. Receptaculum seminis elongated and slightly 

 twisted, and situated to the right and caudad of the ovary. Vitellaria 

 lateral, extending from slightly behind the level of the esophageal 

 bifurcation to the level of the anterior border of the ovary. Uterus 

 composed of close transverse coils and extending from ovary to a 

 short distance in front of acetabulum. Genital pore median, about 

 850/i from the anterior end of body. Excretory canal sigmoid, 

 branching at the level of the anterior border of the anterior testis, 

 the two branches extending extracecally to about the level of the 

 pharynx ; excretory pore terminal. Eggs oval, 30/* long by 15/* wide, 

 and yellowish brown in color. 



Host. — Silver fox {Vnlpes fulva.) 



Location. — Gall bladder. 



Distribution. — United States (Wisconsin.) 



Type specimens. — United States National Museum Ilelminthologi- 

 cal Collection No. 27857; paratypes No. 28179. 



