castle: north AMEKICAN EHYNCHOBDELLIDiE. 61 



spores. Data, accordingly, are wanting for a full description of this 

 parasite, as well as of the others mentioned, and only a portion of its 

 life history is known, i^evertheless I insert this notice in the hope 

 that some one else may be able hereafter to make use of my fragmentary 

 observations. 



Cahbbidge, Mass., June, 1900. 



