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On two new Amphistome parasites of 

 Sumatran fishes. 



(Voyage of Dr. W. Tolz.) 



By 

 Dr. W. G. MacCalhmi, 



Assoc'. Prof. of Pathology. 



(The Jolins Hopkins University, Baltimore.) 



"With 2 figures in text. 



It is difficiüt to find any satisfactory literature bearino- upon 

 the trematode parasites of fish which fall into the family of the 

 Amphidomidae or as Fischoeder has recently named them, the 

 Farampldstomidae. A search of the references given in v. Linstow's 

 Conipendinm and in the catalogue of the Burean of Animal Industries 

 in Washington has resulted in niy finding descriptions of a few 

 forms only. These were made by Diesing ^) froni the preserved 

 material coUected by Natterer in his voyage through Brazil and 

 later copied by Diijardin and otliers. The descriptions, however. 

 and even Diesing's illustrations are so entirely lacking in anatomical 

 details that it is impossible to say whether the forms which he 

 observed were or were not similar to tliose which we have before 



1) Diesing, Monographie der Gattung Amphistoma und Diplodiscus, 

 in: Ann. Wien. Mus., Vol. 1, 1836. 



