Nachdruck verboten. 



üeber setzungsrecht vorbehalten. 



Some undescribed Trematodes. 



By 



J. Staiford, B. A., Toronto, Ph. D., Leipzig. 



(From the Biological Department, University of Toronto.) 



With Plate 26. 



1. Distomum pelagicum n. sj)» 



This Trematode I obtained in Passamaquoddy Bay, off St. Andrew's, 

 New Brunswick. It was to be found among the numerous small 

 crustacea, nauplii and other crustacean larvae, insect larvae, small 

 annelids, eggs etc., procured by dragging beside a boat and half im- 

 mersed in the surface water a System of five small nets placed one 

 inside of another. The moiiths of the nets were supported by strong 

 wire rings about six inches across and the nets themselves were so 

 arranged that the one with the largest meshes was on the inside, 

 that with the smallest meshes to the outside. In this way a sorting 

 of the objects caught took place — only the smallest ones making 

 their way to the outer net. 



I had Seen this animal and had hurriedly examined it, under the 

 microscope, while it was alive, but for want of time paid no further 

 attention to it. I, however, dropped some of the Contents of the outer 

 net into a little bottle of forraaline wliich I brought home. lipon 

 looking over this material a few weeks ago, I could find but 2 specimens 

 of the required Distomum. One I stained slightly and raounted in 

 toto in Canada baisam. The cut, Fig. 1, is drawn from this prepa- 

 ration. The other, smaller and more shrunken specimen, I laid into 

 a series of transverse sections by the microtome; and althougli these 

 did not prove altogether satisfactory yet they served to verify and 

 correct my impressions to a considerable extent. 



Zool. Jahrb. XIII. Abth. 1. Syst. 27 



