216 
GAMMARIDJ;, 
lique. In the second pair the hand is much larger, but 
of nearly the same form, with the palm very oblique, 
and defined by two small spines. The third and fourth 
pairs of walking legs are alike, and have the posterior 
distal extremity of the hand strongly serrated, as have 
likewise the three posterior pairs, hut being reversed, 
the serration is upon the anterior distal extremity. The 
last pair of caudal appendages have the branches of the 
same length, and reach a little beyond the preceding. 
The central tail-piece appears more like a small seg- 
ment of the animal than is usual ; it is cylindrical, and 
surmounted by a small spinule. 
This species was taken by Professor Milne-Edwards, 
off the island of Chausay, and named by him in honour 
of Colonel Montagu, the pioneer of British marine 
zoology. We have procured it from some refuse brought 
by the trawlers from the neighbourhood of the Eddy- 
stone. All our specimens were taken from the back 
and branchial chambers of Maia squinado ; they seemed, 
indeed, to exist among the thick stiff fur on the carapace 
of this spider-crab as if they were in their accustomed 
habitat, their prehensile legs being peculiarly adapted for 
holding themselves on that animal. 
