KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 3,5 



The second pair (Pl. II, fig. 17, 18 and 86). The femur is a little loiiger but 

 scarcely narrower than in the first pair; it is shorter than the followiiig juints togethei". 

 The carjjus is half as long as the feinur, inuch longer than the metacarpus, which 

 has the apical projections lai-ger, broader, and more gauge-shaped than in the preceding 

 species. The dactylus has an appendicular tooth near to the apex. 



The third and, fourth pairs. The fe mur is dilated elongate-ovate, almost as long 

 as the three following joints together. The tibia is a Kttle longer than the genu. The 

 carpus is a little longer than the two preceding joints together, somewhat dilated, the 

 hind margin convex. The metacarpus is longer than the metacarpus of the fifth and 

 sixth pairs, and fully as long as the next preceding joint. The dactylus is longer than 

 a fourth of the metacarpus. 



The jifth and, sixth pairs (Pl. II, fig. 37) are as long as the two preceding pairs, 

 and considerably shorter than the perajon. The fem ur is dilated, a little shorter than 

 the three following joints together. The carpus is much longer than the metacarpus. 



The seventh pair (Pl. II, fig. 19 and 38) are only a little shorter than the sixth 

 pair, reaching farther down than to the middle of the metacarpus. The femur is luore 

 dilated than in the preceding pairs, fully as long as the femur of the sixth pair, and 

 equalling the three following joints together in length. The carpus is usually very di- 

 lated, more or less ovate. The metacarpus is curved, somewhat more than half as long 

 as the cai"pus. 



All the joints of the perasopoda are provided with glands which will be spöken of 

 more closely in the morphological part of this treatise. 



The pdeon is comparatively longer than in the three preceding species, and the lateral 

 parts reach farther down, the first two being as long as the corresponding segments, evenly 

 rounded below, those of the third segment are produced backwards longer than the seg- 

 ment, the lower hinder corner obtusely i"Ounded. 



The pleopoda (Pl. II, fig. 20 and 39) are much larger in the male than in the fe- 

 male, the peduncles being almost three times longer than the rami, swoUen, globular; in 

 the female they are not twice as long as the rami, more or less egg-shaped. The number 

 of articuli of the rami is the same in male and female, six in the inner ramus and eight 

 in the outer. 



The urus. The first segment is about as long as the coalesced second and third, 

 and half as long as the last pleonal segment. 



The uropoda (Pl. II, fig. 21 and 40). The peduncle of the first pair is narrow, 

 linear, almost twice as long as the inner ramus; the outer ramiis is narrow, almost 

 styliform, smooth, shorter and narrower in the female than in the male; the inner ramus 

 is three times longer than the breadth of the peduncle in the male, somewhat shorter in 

 the female; the outer margin is pectinated in the male and sen-ated in the female, in both 

 sexes the inner margin is smooth on the upper half, and feebly serrated on the lower. 

 The peduncle of the second pair is broad, a little longer than the inner ramus; the outer 

 ramus is shorter than the inner, narrow, smooth on the outer margin, serrated along the 

 inner; the inner ramus is almost twice as broad as the outer, serrated on both margins. 

 The peduncle of the third pair is broader than that of the second pair, nearly three times 



