10 BOVALLIUS, A NEW ARCTIC ISOPOD. 



dactylus is feebly curved and distinctly pedunculated, the 

 peduncular part being a tliird longor than the claw. At the 

 end of the pedimcle are some few short hairs. At the inuer 

 side is an excavation as in the three first pairs of pereiopoda. 



The sixth paii' of legs [PL II. fig. 18] are the longest of 

 all, about a sixth longer than the fifth pair. The femnr is 

 three times longer than broad; at the inner margin it is cur- 

 ved and armed as in the preceding pair: the outer margin is 

 feebly curved, flattened into a lamina much narrower than 

 the lamina of the fifth pair, armed with 8 — 9 ciliated hairs. 

 The genu is longer than a third of the femur, Avith two bristles 

 on the inner side, 6 — 8 at the lower inner corner, and 5 at 

 the outer. The tibia is longer than the genu, armed with 

 three bristles along the inner margin, 4 at the lower inner 

 corner, and 6 — 8 at the outer. The carpus and the meta- 

 carpus, as in preceding pair. The daci>/his [Pl. II. fig. 19] 

 is shorter than the metacarpus, feebly curved and distinctly 

 pedunculated. The peduncular part is more than two times 

 longer than the claw, with a distinct excavation. 



The seventh pair [Pl. II, fig. 20] are shorter than the sixth 

 pair, but a little longer than the fifth. The femur is feebly 

 curved at the inner and outer margins. The outer margin 

 wants the lamina of the other pairs of walking feet, but is 

 provided with three ciliated and two simple hairs. The genu 

 is a little shorter than half the femur, stout, and carries some 

 short bristles at the inner side and at the lower corners. The 

 tibia and the carpus, as in the sixth pair. The metacarpus 

 is longer than the carpus, with two pairs of short bristles on 

 the inner side, three longer ones at the lower inner corner, 

 and some short ones at the outer. The process of articulation 

 is well developed. The dactylus is about half the length of 

 the metacarpus, pedunculated, broad at the base, feebly curved, 

 with a distinct excavation. The peduncular part is two times 

 longer than the claw. 



The pleon is narrower than the base of the pereion, and 

 coraposed of five joints or annuli. The surface is smooth, of 

 tho same clear white colour as the pereion. At the hinder 

 margins of the segments two small angular prominences are 

 to be seen. There are no traces of articulated epimerals, but 

 the flanks of the segments extend backwards, ending in sharp 

 points. The flanks are bent inward on the under side of the 



