1902-1903.] Dzstribution of the Smaller Crustacea. II 
A copepod is found on the hake (Merlucius merluccius) which 
differs from many others in the mode of its attachment. This 
species, instead of fixing itself to some vital part of the fish, 
such as the gills, sends out a process which penetrates one of 
the scales, and expands between the outer and inner surfaces 
of the scale into a thin round disc, which is ornamented with 
several clear narrow slits arranged like the radii of a circle: 
it is from this latter peculiarity that the species derives its 
name of Anchorella stellata. It is scarcely possible to remove 
the copepod without also removing the scale along with it. 
All the specimens I have hitherto noticed have been attached 
to scales in the neighbourhood of the pectoral and ventral fins, 
especially the former. The first specimens observed looked 
like globules of semi-transparent mucus, but finding that the 
globules were somehow fixed, I was led to examine them more 
closely, and so was enabled to add another species to the 
copepod fauna of our seas. I have so far only found this 
parasite on hake sent from the Clyde, but it is likely to occur 
on the same fish from other parts of our coast. It is interest- 
ing to note that Kroyer, who first described the species, 
obtained his specimens also from the hake. 
Another parasitic crustacean, remarkable because of its size 
and from the position in which it is found, is the large Charo- 
prnus dalmanni of Retzius. This species is usually found in 
the spiracles of the grey skate (Raia batis), and adult female 
specimens attain a length of fully two inches. I have some- 
times found the parasite in both the spiracles of the same 
skate, and frequently two, and occasionally three, specimens in 
the one spiracle. The species is not uncommon on large grey 
skate brought to the Aberdeen fish-market, and it has also 
been obtained on a grey skate captured at the mouth of the 
Forth estuary. Two other species of Charopinus have been 
recorded—viz., C. ramosus, Kroyer, found on Raia clavata and 
aia maculata, and C. dubius, found on Raia circularis ; but 
these two species are usually found on the gills of the different 
skates, instead of in the spiracles. 
Two parasitic copepods belonging not only to two different 
genera but also to two different families have been found on 
the gills of the spotted dragonet (Callionymus maculatus). 
The one is called Hemobaphes ambiguus, and belongs to the 
