107 



investigations of the fauna of the Varangerfjord. I have had an opportunity 

 of seeing his detail drawings of the species and have thereby been enabled to 

 indentify his species with a form recently found by me in one solitary specimen 

 among my material of 0. Edirardxii. The species is easily distinguished 

 from the latter by the form of the lateral corners of the cephalon, bv the 

 very short and stont antennae and by the structure of the anterior gna- 

 thopoda. 



Occurrence. As stated above, Mr. Schneider found this species in 

 the neighbourhood of Tromso, and the specimen here figured was probably 

 likewise from some place in Finmark. 



48. Onesimus plautus, (Kroyer). 



(PL 37, fig. !) 

 Anonyx 2)lftitf>ix, Kroyer, Nat Tidsskr, 2. Rsekke, Bd. 1, p. G29. 



Body short and robust, though somewhat compressed. Cephalon lon- 

 ger than the 1st segment of mesosome, lateral corners acute at the tip. An- 

 terior coxal plates rather narrow and about twice as deep as the body; 1st 

 pair scarcely expanded below; 4th pair but very little emarginated posteriorly 

 and obtusely produced below the emargination ; 5th pair rather large, fully 

 as deep as broad. Last pair of epimeral plates of metasome considerably 

 produced at the lateral corners and terminating with an upturned point. 

 First segment of urosome but very slightly impressed dorsally. Eyes irre- 

 gularly oval and considerably expanded below, in male much larger than in 

 female, pigment red. Superior antennas in female about the length of the 

 cephalon and the 2 first segments of mesosome combined; peduncle rather 

 thick ; flagellum attenuated, somewhat longer than the peduncle and composed 

 of about 11 articulations, the 1st of which about equals in length the 3 

 succeeding ones combined; accessory appendage a little exceeding the half 

 length of the flagellum and 4-articulate, 1st joint longer than the others 

 combined. Inferior antennae somewhat longer than the superior, flagellum 

 composed of about 13 articulations. Both pairs of antennas in male conside- 

 rably longer than in female, the flagella being very slender and composed of 

 a greater number of articulations. Anterior gnathopoda with the propodos 

 about the length of the carpus and nearly transversely truncated at the tip, 

 though the inferior corner is rounded off. Posterior gnathopoda witli the 

 propodos exceeding half the length of the carpus and slightly dilated disl ally. 

 Posterior periopoda very short and strongly built, moral joint in all conside- 

 rably expanded, basal joint of last pair oblong oval and much longer than 



