532 TAGE SKOGSBERG 



E n fl o p () d i t e: The posterior distal bristle on the first joint is somewhat shorter than 

 the bristle on the end joint. 



Sixth limb: — The posterior edge is fairly straight or sometimes even slightly 

 concave, but the posterior ventral corner is rather broadly rounded. There are 22 — 24 posterior 

 and seven anterior ventral bristles. Two bristles are developed on the anterior edge of the limb. 



Seventh limb: — Very like the corresponding limb in A. Grimaldi. In exceptional 

 cases it has only eleven cleaning bristles. 



The f u r c a is armed with ten claws, of which the seven or eight distal ones may be 

 termed main claws. The two anterior main claws are equipped with ventral spines right to 

 their bases, the proximal ones of these spines are, however, of the same type as those situated 

 more distally. The two posterior secondary claws are annulated. 



The lateral eyes are well developed. The median e y e is bare. 



Male: — 



Shell: — Length. 2,42 mm.; length : height about 2:1; length to breadth about 

 2,25 : 1. S e e n f r o m the s i d e (fig. 3) it is of about the same type as that of the male 

 of A. Grimaldi, but, as is shown by the figures given above, it is somewhat higher relatively. 

 The anterior and posterior arcuations of the dorsal margin are somewhat more defined. The 

 part beneath the incisur dominates somewhat over the part above it. The posterior part of 

 the shell is cut off rather abruptly, the posterior margin is rather slightly rounded, the posterior 

 dorsal corner is somewhat more distinct than in A. Grimaldi. Seen from below (fig. 4) it is of 

 the same type as in the species just mentioned. The wreath of hairs round the posterior part 

 of the shell is rather dense. Seen from inside: Medial bristles: These are much the same 

 as in the female, but somewhat more sparse; the short bristles that are interspersed among 

 the longer bristles seem to be considerably more numerous, compared with the latter than in 

 the female. Apart from this the shells of the two sexes are alike. 



First a n t e n n a (fig. 8) : — For the proportions between the joints see the description 

 of the genus. This antenna is very like that of A. Grimaldi; cf. fig. 11 of this species. We may 

 note: Of the six anterior bristles on the third joint no. 5, like this bristle in the above-mentioned 

 male, but contrary to the female, is armed with long, stiff secondary bristles arranged fairly 

 well on all sides. The a-claw is finely pectinated and is somewhat shorter than the anterior 

 side of the sixth joint. The c- and f-bristles are subequal and about Vs times as long as the 

 shell (3,3 to 3,5 mm. was observed); 33 — 34 sensorial filaments were observed on the c-bristle, 

 31—32 on the f-bristle. 



Second antenna: — The exopodite is considerably longer than in the female, 

 the two proximal joints especially being very much lengthened. The proportion between the 

 jcjints is shown by the following figures: 



S (shell 2,42 mm. long) = I : II : (III— IX) -= 47 : 1(3 : 2t). 



For the sake of comparison the corresponding figures (measured on the same scale) for 

 the female second antenna may be given: 



V (shell about 2,2 mm. long) = I : II : (III^IX) - 29 : : 21. 



