34 



ENTOZOA. 



altogether (substituting DicroccBlium, as Weinland lias done) than 

 to place the fascioles under any other title than that indicated by 

 Linneus. 



Campula. — The propriety of the view above advanced is ren- 

 dered more cogent by the discovery of an intermediate type of 

 fluke, whose digestive coeca, instead of displaying the dendritic 

 character of the Fascioles, offer a peculiar zigzag-like form ; hence 

 the generic title {Kafj.TruXo^) . In April, 1855, I procured about fifty 

 specimens of this trematode (Fig. 10) from the liver of a common 

 porpoise [Delj^Mnus phoccena). They occupied the peripheral 



Fia. 10. — Campula oblonga, Cohhold ; from the liver of (lie Porpoise. X 15 diam. — Original. 



extremities of the biliary ducts, which were, in the situations 

 occupied by the flukes, remarkably thickened and knotted. As 

 many as seventeen individuals were found associated at one spot. 



Bilharda. — Up to the time of Bilharz's announcement of the 

 existence of the Distoma hoematohiwn, which he found so abundant 

 in the people dwelling on the borders of the Nile, almost all the 

 flukes were considered to be hermaphroditic, or, in other words, 

 each individual was furnished with both male and female organs ; 

 the only exception being that of the Bistoma filUcolle, regarded by 

 Rudolphi and Dujardin as a species of Monodoma. Guided by this 

 fact and by the circumstance of other co-existing peculiarities, I 

 formed a distinct genus for the reception of the Egyptian fluke, 



