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



curved, the inferior feebly concave, both serrated and beset with short spines; the two 

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



The second pair of antennoe (PI. VI, fig. 5) were unfortunately broken in the only 

 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, the 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 seems very probable that the second pair of antenna? are very 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 much the longest, the following decreasing in length. The last three pereional seg- 

 ments are almost twice as long as the fourth (16:9). 



The epimerals are smaller than in the preceding species, those of the fifth and sixth 

 pairs are bent outwards rectangularly. 



The branchial sacks of the second and third pairs are very small, those of the 

 following three pairs much larger. 



The first pair of pereiopoda (PI. VI, fig. 6) are very robust. The carpus 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 lower margin of the carpus. The dactyl us 

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



The second pair (PI. VI, fig. 7); the tibial process is shorter than a fifth of the 

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

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

 metacarpus, feebly curved. 



The third and fourth pairs (PI. VI, fig. 8) are equal; the femur 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 fifth and sixth pairs (PL VI, fig. 9 and 10) are almost equal; they are much 

 longer than the pereion (15:11); the femur is linear, elongated, narrow; the tibia is 

 longer than the carpus, not equalling the metacarpus in length. The dactylus of 

 the fifth pair is smooth, the margins of the metacarpal excavation 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 (PI. 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 pleon 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 very deep, feebly rounded. 



The pleopoda (PI. VI, fig. 12); the peduncles are shorter than the rami; the rami 

 are 15 -jointed. 



The urus 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. 



