the 2 first segments of mesosome combined, pednncle rather thick, witli tlie 

 1st joint more than twice the length of the other 2 combined; flagellnm not 

 i[uite twice the length of tlie peduncle, IG- articulate, 1st joint comparatively 

 sliort, scarcely as long at the 3 sncceeding ones combined ; accessory appen- 

 dage not (|uite half as long as the flagellnm and 7-articnlate. Inferior 

 antennte in female half as long again as the superior, tlagellum composed 

 of abont 28 articulations. Ejustonie biit slightly projecting in front of the 

 anterior lip. Anterior gnatliopoda with the propodos as long as the carpus, 

 palmar edge somewhat arcuate and finely serrated but not defined below by 

 any trace of angle. Posterior gnathopoda with the propodos half as long as 

 the carpus. The 2 posterior pairs of pereiopoda rather elongated, with the 

 basal joint of moderate size. Last pair of nrojioda with the inner ramus 

 scarcely longer tlum the basal joint of the outer. Telson not fully twice as 

 long as broad, slightly tapering distally, with 2 pairs of dorsal denticles, 

 cleft very narrow, extending almost to the base. Body cream-coloured with 

 a faint rosy tinge, dorsal part of body-segments bright apple-red ; ova in the 

 marsupial pouch dark violet. Length of adiolt female 18 mm. 



Bemarks. — I think the Rev. Mr. Stebbing is quite right in restoring 

 the specific name at first given to this tbrni by 0. Fabricius. The identity 

 of the Oniscus cicada of that author with Anonijx fiuhsus (Kriiyer) seems in 

 fact to be beyond any doubt, and Kroyer himself has also suggested the same. 

 It is the type of the present genus. 



Occurrence. — This is by far the commonest of all the Norwegian 

 Lysianassidae, occurring very frequently along the whole coast, from Christi- 

 ania to Vadso, in depths varying from 20 to 200 fathoms. I have taken 

 this form in quite extraordinary numbers in small crab-pots baited with 

 dead fish, and also on the body itself of dead fishes fastened on the 

 fishing lines it may often be found clinging in innumerable swarms. 



Distrihition. — Arctic Ocean, widely distributed: Greenland, Spits- 

 bergen, Iceland, Matotschkin Skar, the Kara Sea ; Norwegian North-Atlan- 

 tic Expedition in several places, down to a depth of G49 fathoms ; British 

 Isles, Bohu.slan. 



311. Hoplonyx similis, (x. 0. Sars, n. sp. 



(PL 33, fig. 1). 



Very like the preceding species, but the bod3' .somewhat less robust 

 and more compressed. Cephalon alxiut the length of the 1st segment of 

 niesosome, lateral corners distinctly angular at the tip. Anterior coxal plates 



13 — Crustacea. 



