124 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



fish, Scyllium canieula, and occasionally on the fins of the 

 tope. 



Lerncenpoda bidiscalis, W. V. de V. Kane. 



A remarkably distinct species, and always found on 

 the ends of the claspers of the male tope, Galeus eanis. 

 These claspers, where the parasites are adhering, are 

 almost invariably found to be torn and bleeding. A 

 third species, Lervceopoda cluthce, T. Scott, is found on 

 the gills of Raia fullonica; a fourth L. salmon ea 

 (Gisler), on the gills of the salmon; and a fifth L. 

 elongaia (Grant), attached to the eye of the Porbeagle 

 shark and the Greenland shark, but none of these have, 

 so far, been recorded from the Irish Sea. 



Brachiella oralis (Kroyer). 



Attached to the gill rakers of the common gurnard, 

 more common on half-grown fish than adults. 



Brachiella iiisidiosa, Heller. 



A moderately-large species, and found only on the 

 gill of the hake. A considerable number are sometimes 

 found on one fish. Another species, Brachiella merlucci, 

 Bassett Smith, attaches itself to the gill rakers of the 

 hake, but so far has not been seen by us. 



Anchorella uncinata (Miiller). 



Very frequent in the mouth, &c, of species of Gadus, 

 such as whiting. 



Anchorella appendiculata, Kroyer. 



From the hake, but the position in which they were 

 found is not stated. 



Nicothoe astaci, And. and M. Edw. 



THis peculiar copepod is sometimes found in con- 

 siderable numbers on the gills of the common lobster. 

 The wing-like projections of the fourth thoracic segment 



