PROCEEDIISrGS OF THE NATIONAL MUSEUM. 



VOL 60. 



Table of comparison between Echinochasmus pcrfoliatus von Ratz and 

 Echinochasmus perfoliatus sMeldsi. 



The present form, while it closely resembles Echinochasmus per- 

 foliatus von Eatz, presents several differential details which, if one 

 could be sure of their constancy, would permit its recognition as a 

 distinct species. But as it is impossible to decide this without ex- 

 amining other lots of specimens from the same locality and, if possi- 

 ble, making an actual comparison with the European form, it has 

 been thought proper to consider this parasite only as a variety of 

 the European species. The accompanying table shows concisely not 



