CAMMARUS CAMPYLQPS 
377 
tween G. marinus and G. locusta, and as such we consider 
it to be one which we have observed also on the Devon- 
shire coast. We can perceive no distinction, except in 
the form of the eyes, between the description of this 
species and that of G. locusta of Liljeborg, and we have 
therefore considered them to be identical. 
The following vignette exhibits a Gammarus in the 
act of shedding its skin, a full account of which process 
will be given in the Introduction. 
