KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 21. N:0 5. 37 



curvecl, tlie inferior feebly concave, botli serrated and beset with sliort spiiies; the Uvo 

 following joints are very minute, the last tipped with two luinute hairs. 



The second ijair of antennce (Pl. ^'I, tig. .5) were unfortunately broken in the onlj' 

 specimen I have seen, but even in their mutilated state they reached beyond the posterior 

 margin of the second pereional segment. The second joint is about six times longer than 

 the first, tlie third is more than twice as long as the second ; of the first joint of the fla- 

 ellum there is only a short piece left, but judging from the length of the third peduncular 

 joint it secms very pro1)able that the second pair of antennif are ver-s' long, longer than in 

 all the other species. All the joints are finely serrated on the upper margins and beset 

 with short hairs, a little longer on the second peduncular joint. 



The pereion; the first segment is nearly twice as long as the seventh; the second 

 is nnicli the longest, the following decreasing in length. The hist three pereional seg- 

 ments are almost twice as long as the fourtli (IB: 9). 



The epimernls are smaller than in the jn-eceding species, those of the fifth and sixth 

 pairs are bent outwards rectangiilarly. 



The branchial säcks of the second and tliird pairs are very small, those of tlie 

 following tln-ee pairs much larger. 



The frrst pair of pereiopoda (Pl. W, tig. 6) are very robust. The carjjus is 

 longer than broad, the lower margin straight; the metacarpus is very thick, swollen, 

 the anterior margin semicircular, the posterior a little less convex, finely serrated below 

 and beset with hairs; it is shorter than the lowei- margin of the carpus. The dactylus 

 is almost straight, iinely serrated at the posterior margin, as long as half the metacarpus. 



The second pair (Pl. \\, lig. 7); the tibial process is shorter than a tifth of the 

 carpus. The carpus and metacarpus are equal in length, the margins feebly curved 

 and beset Anth very short equidistant hairs. The dactylus is shorter than a third of the 

 metacarpus, feebly curved. 



The third and fourth pairs (Pl. VI, lig. 8) are equal; the fem ur is narrow, a little 

 broader below; the tibia is about as long as the carpus, the metacarpus a little longer. 

 The dactylus long, slender. 



The jifth and sixth p)airs (Pl. VI, fig. 9 and 10) are almost equal; they are much 

 longer than the pereion (1.5:11); the femur is linear, elongated, narrow; the tibia is 

 longer tlian the carpus, not equalling the metacarpus in length. Tlie dactylus of 

 the iitfh pair is smooth, the margins of the metacarpal exca\ation straight; the dactylus 

 of the sixth pair is provided with short spines on the concave margin; the margins of the 

 metacarpal excavation are rounded. 



The seventh pair (Pl. VI, fig. 11) are shorter than the fourth (11:13) but longer 

 than half the sixth pair (11 : 19). The dactylus is finely serrated along the concave margin. 



The ^^Zfon is as long as the last three pereional segments together; the dorsal line 

 forms a keel but is not serrated; the lateral parts are not \ery deep, feebly rounded. 



The pleopoda (Pl. \l, fig. 12); the peduncles are shorter than the rami; the rami 

 are 15-jointed. 



The U7'us without the telson is as long as the last two pleonal segments together; 

 the second and third segments are coalesced into one, almost twice as long as the first. 



