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There are many different kinds of worm parasites 
infesting local fishes, and as this group has only recently 
been seriously investigated in our district, we expect that 
the present list will soon be greatly extended. The 
Cestodes and Nematodes have still to be worked out. © In 
addition to the fishes, many marine invertebrata are also 
more or less infested with parasites, some containing im- 
mature stages of the fish parasites. 
The Copepod parasites are almost entirely confined to 
places in divect communication with the exterior. They 
may be found on the skin, the fins, in the mouth and 
branchial chamber, in the lateral line canal, attached 
to the gills and operculum, in the nostrils, in the 
eye and sometimes even burrowing into the abdominal 
cavity. In many cases their life history and anato- 
mical structure ave only partly known. Some are 
almost free, but the majority are true parasites, 
depending entirely upon their host for food, and having 
no means of locomotion. The males of the attached forms 
are extremely small and easily overlooked. © All hatch 
from the egg as Naupli and undergo very considerable 
metamorphoses before arriving at maturity. In some 
genera the development is wholly progressive. In others, 
such as Lernwa, when a particular stage is reached 1 
becomes retrogressive. At one end of the group the para- 
sites are practically free swimmers, and at the other they 
are mere inert sacs whose relationship with such forms as 
Caligus appears very remote. 
Bomolochus solew, Claus. 
In the nostrils of cod, greater fork-beard, plaice, &c., 
also on the skin of the common sole. A number of 
specimens of this copepod can usually be secured by 
forcing out the mucus from the inner part of the nostrils 
of medium sized cod. On placing the mucus in a watch 
