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Lernea minuta, T. Scott. 
On the gills of the common goby, Gobius minutus. 
When present, this parasite is easily noticed, as it causes 
a considerable expansion of the operculum, and projects 
from under it. 
Haemobaphes cyclopterinus (Fabr.). 
This appears to be a rare species and is not often met 
with; only one specimen has been observed by us. — It 
was found on the gill rakers of Cottus scorpius. 
Oralien asellinus (Linn.) 
Occurs frequently on the gills of the common gurnard. 
Other workers have also recorded it from the gills of plaice 
and halibut. 
Chondracanthus cornutus (Muller). 
Occasionally found on the gills of plaice. Size, 6 
min. to 7 mm. 
Chondracanthus clavatus, Bassett Smith. 
On the gills of the lemon sole, Pleuronectes micro- 
cephalus. Size, 6°59 man. 
Chondracanthus solee, Kroyer. 
A well-marked species occasionally found on the gills 
of the common sole. Size, 7°59 mm. to 85 mm. 
Chondracanthus lophi (Johnstone). 
This appears to be one of the more common members 
of the Chrondracanthide, and is frequently found in the 
gill chamber of the Angler fish. 
Chondracanthus merluecii, Holten. 
Very common sometimes in the hake, and may be 
found on the roof and sides of the mouth, and also on the 
under side of the tongue, and attached to the inner surface 
of the operculum. Size 12°5 mm. 
In all the Chondracanthus the males are very small, 
