L>3l'. TACK SKOGSBERG 



field on tlie upper lip is situated more in one plane; besides, as has been pointed out above, the 

 dorsal protuberance between the upper lip and the rod - shaped organ has only a 

 single point). 



The lateral eyes are large. 



Male: — 



Shell: — Length: 2,1 — 2,2 mm.; length : height, about 1,4 : 1. Seen from the 

 side: The greatest height is situated about at tlie middle; the posterior part of the shell is 

 not perceptibly larger than the anterior part. The dorsal border is somewhat less flattened 

 anteriorly than in the female. With a rather well-developed, broadly rounded posterior corner 

 somewhat ventrally of half the height. In other respects the male shell is like that of 

 the female. 



First antenna: — The bristles of the third and fourth joints seem to be somewhat, 

 though rather slightly, shorter than these bristles in the female. Bristles of the seventh joint: 

 The b-bristle is about as long as the anterior side of the second to the fourth joints; it has foiir 

 filaments, of which the three proximal ones have suctorial organs and the distal one, which 

 issues close to the distal of the three former ones, is short and bare; the proximal filament has 

 a powerful, rounded, verruciform process distally of the suctorial organ [about the same as in 

 figure 15 of C. (Vargula) norvegica]; the two other filaments with suctorial organs are rather 

 long and powerful, the distal one extending somewhat beyond the point of the principal bristle, 

 and having four suctorial organs distally, proximally of which a small wart, like a shaft of still 

 another suctorial organ, is to be found. The c-bristle is somewhat longer than the preceding 

 bristle; it has nine filaments; of these the three proximal ones have suctorial organs and are 

 of exactly the same types as the filaments with suctorial organs on the b-bristle. Bristles of the 

 end joint: The f- and g-bristles are about as long as the whole antenna, the latter only slightly 

 longer than the former; the f-bristle has ten, the g-bristle eleven filaments. In other respects 

 this antenna agrees with that of the female. 



Second antenna: — The p r o t o p o d i t e and the exopodite are similar 

 to those of the female. The e n d o p o d i t e (fig. 8): The first and the second joints are rather 

 long and powerful, the latter not quite twice as long as the former, both almost uniformly thick; 

 the end joint is about a third of the length of the second joint, narrow, of about the same 

 thickness throughout its whole length, curved ventrally and distally furnished with a few irre- 

 gular teeth. The bristles of the first joint completely agree with those on this joint in the 

 female. The second joint has, at about two-thirds of the way along it, two subequal rather 

 short ventral bristles. The proximo-dorsal bristle of the end joint is somewhat shorter than 

 the total length of the two proximal joints; close to the point of the end joint there are two 

 exceedingly short bristles placed close together. 



The mandible, maxilla, fifth and sixth 1 i m b s are similar to those 

 of the female. 



Seventh limb: — This also shows a great agreement with that of the female, 

 but the end comb seems, however, to be somewhat weaker; it has from nine to eleven distal 

 teeth and on each side of these from two to four proximal teeth. 



