107 
THE JER FALCON. 
Falco Islandicus, Latham. 
PLATE III 
Hierofalco Islandicus, Cuv. Reg. Anim. i. 323 Gryfalco 
Islandicus, Brisson. (immature plumage.) — Gyrfalcon, 
Pennant , Brit. Zool. — Faucon Gerfaut, Temminck, 
Man.i. 17 Gryfalco candicans, Fleming , Brit. Anim - 
The Jerfalcon, Montague, Lowe, Beioick, Selby, Yarrell. 
The Baron Cuvier applied to this bird the 
generic appellation of Hierofalco, placing it at the 
conclusion of his true falcons ; and our country- 
man Dr Fleming, gives it the same situation, 
using Brisson’s title of Gryfalco. The absence 
of the lacerating tooth upon the mandible is the 
reason assigned for the removal, as all the other 
parts of the form are acknowledged to be quite 
typical. In all the specimens we have seen, the 
tooth has been fully, and in some strongly 
developed ; and we suspect that the want of it is 
an accidental or occasional circumstance ; in 
the wood-cut, p. 106, taken from a Scottish 
specimen, it will be seen strongly marked. 
We can only rank this fine species as an 
occasional straggler among us, and even in the 
