107 



investigations of tlie fanna of tlie Varangertjord. 1 have liad an oppoifunit}' 

 <if seeing his detail drawings of the species and liave thereby been enal)led to 

 indentify liis s]jeeies with a fomi recently fonnd by me in one solitarj' specimen 

 among my material of 0. Edwardmi. The species is easilj^ distinguislied 

 from the latter bj' the form of tlie lateral corners of the cephalon, by the 

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

 thopoda. 



Occurrence. — As stated above, Mr. Schneider fonnd this species in 

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

 likewise from some place in Finmai-k. 



48. Onesimus plautus, (Kroyer). 



(I'l. 37, fig. 1) 

 Anonyx plant us, Kriiyer, Nat Tidsskr. 2. RKkke, Bd. 1, p. 629. 



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 tlie lateral corners and terminating with an iipturned point. 

 First segment of urosome but very slightly impressed dorsall}^ Eyes irre- 

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

 female, pigment red. Superior antennae in female about the leng-tli of the 

 cephalon and the 2 first segments of mesosome comlnned ; 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 flagelh^m and 4-articulate, 1st joint longer than the others 

 combined. Inferior antennae somewhat longer than the superior, flagellum 

 coniposed of about 13 articulations. Both pairs of antennae in male conside- 

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

 a. greatei' number of articulations. Anterior gnathopoda with the jiropodos 

 al)out the length of the carpus and nearly transvei'sely truncated at the tip, 

 though the inferior corner is rounded otf. Posterior gnathopoda with the 

 jiropodos exceeding half the length of the carpus and .slightly dilated distally. 

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

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



