66 



spinules. Eyes very large, nearly quadrangular, almost meeting above at one of 

 their angles. Superior antennae with the 1st joint of the peduncle rather short 

 and concealed by the produced front, flagellum shorter than the peduncle and 

 6-articulate. Inferior antennae more than twice as long as the superior, flagellum 

 considerably exceeding the peduncle in length. Anterior pairs of legs rather 

 strong, meral joint armed inside with 3 blunt spines, propodos rather broad, 

 with 3 strong spines inside, dactylus large falciform. Uropoda with both plates 

 oblong, densely ciliated, and partly edged with short spinules, the inner one a 

 little broader than the outer, and rounded at the tip. Colour light reddish brown, 

 caudal fan sub-hyaline. Length of adult animal reaching to 24 mm. 



Remarks, This form was described under the above name by Leach as 

 early as in the year 1815. Subsequently it was recorded from the Norwegian 

 coast by Prof. Lilljeborg under another name, viz., Aclierusia rotunclicmida. It 

 looks, on the whole, very like an ^Ega, but may be at once distinguished by the 

 more depressed, and less compact body, the large angular eyes, and the evenly 

 rounded terminal segment of the metasome. Not yet sexually developed specimens 

 are more frequently met with, and in these the body appears much more slender 

 than in adult specimens, in which it is considerably shortened by the closer 

 crowding together of the segments. 



Occurrence. The species occurs not infrequently along the whole south 

 and west coasts of Norway, at least to the Trondhjem Fjord, and is not infrequently 

 taken up in the dredge, though it is more generally found clinging to the skin 

 of fishes of various kinds, for instance the conrmon cod, the haddock, the ling etc. 



Distribution. British Isles (Leach), Oresund and Kattegat (Meinert), the 

 Faroe Islands (Schodte & Meinert). 



Gen. 3. SySCemiS, Harger, 1878. 



Syn : Harponyx, G. O. Sars. 

 Rocinela, Bovallius (not Leach). 



Generic. Characters. Body depressed, with the cephalon comparatively 

 small, and the metasome narrowing abruptly to a much smaller width than the 

 mesosome; terminal segment very large. Eyes wanting. Antennae nearly as in 

 Rocinela. Mandibles with the cutting edge simple, acuminate, palp of moderate 

 length. Maxillipeds with the terminal part bi-articulate. Anterior pairs of legs 

 with the propodos smooth, cylindric, not expanded, dactylus extremely strong, 



