CANADIAN FALCONID^. 443 



One liook (^ig. 3) is cracked, and is interesting as showing an in- 

 ternal pulp cavity. 



This parasite evidently belongs to the genus Echinorfiynchus ; but 

 owing to not having access to books containing descriptions of 

 all the known species of the genus, I am unable to say if it is 

 new, or previously described. Possibly it may prove to be E. fusi- 

 Jormis which is parasite in the European trout ; but I think it probable 

 that as our "White Eish does not occur in Europe, where the other 

 species have been described, it may prove a distinct species. In this 

 case I would propose the name of E. Coregoni alhi as indicating the 

 fish in which it is parasite. 



The accompanying wood'cuts have been engraved from carefully 

 executed microscopical drawings, and suffice to convey a tolerably 

 accurate idea of the most noticeable peculiarities of this intestinal 

 parasite. Eig. 1 is on too small a scale to c onvey any very minute 

 details, and especially fails to show the arrangement of the sacculi in 

 two rows, at the head and upper portion of the stomach. It is suf- 

 ficient, however, to illustrate the general form of the animal. 



Eig. 2. Shows the arrangement of the hooks, and their form. 

 Those appearing straight being seen edgeways. 



Eig. 3 shows one of the hooks which was cracked, exhibiting an 

 internal pulp cavity. 



THE FAMILY OF FALCONID^. 



BY EET. W. HINGES, I'. L. S. 



PEOFESSOK 03? NATUBAL HISTOET, UNIVEESITY COILEGE, TOEOIfTO. 



Bead before the Canadian Institute, 11th December, 1858. 



The notices I am about to lay before the Institute have occurred to 

 me, in connection with efforts made to improve the collection of 

 native birds in the museum of the University of Toronto. I have 



