SEA-FISHERIES LABORATORY. 123 



being little over half a millimetre in length, and usually 

 found on the abdomen of the female. 



Thysanote impudica (Nordmann). 



A moderately rare species and only appears to be 

 found on the gill rakers of Trigla hirundo. 



Lernanthropus kroyeri, van Beneden. 



At first examination this species might be mistaken 

 for Chondr acanthus merluccii, but can easily be distin- 

 guished from that parasite by the structure of the appen- 

 dages. Only found on the gills of the bass, Labra.v lupus. 

 Its deep brown colour makes it a conspicuous object 

 amongst the bright red coloured gill filaments. 



Charopiniis dalmanni (Eetz.) 



This species appears to be confined to the spiracles of 

 the grey skate, R. batis, where it is anchored by the large 

 second maxillipedes. It is of large size and sometimes 

 measures nearly 2\ inches from the apices of the second 

 maxillipedes to the end of the ovisacs ; usually only one 

 specimen is present in a spiracle, but occasionally two 

 and three specimens are found in one spiracle. 



Charopiniis ramosus, Kroyer. 



A much smaller species than the last, being only 

 about one-fourth the size. It has quite a different habitat 

 from that of C. dalmanni, and is found attached to the 

 gills and gill rakers of Rata clavata and R. maculata. A 

 third species, C. dubius, T. Scott, is found on the gill 

 rakers of R. circular is and R. fullonica. It has not been 

 recorded from the Irish Sea but we have taken it from R. 

 fullonica captured off Dubh Artach and landed at Fleet- 

 wood by one of the trawlers. 



Lernceopoda galei, Kroyer. 



On the claspers and fins of the lesser spotted dog- 



