KONGL. SV. VET. AKADEMIENS HANDLINGAE. BAND. 21. N:0 5. 49 



The second pair of antennce (Pl. VII, tig. 3) are seven- to nine-jointed in the raale, 

 and five-jointed in the female; the third and fourth joints are the longest; the follo-wing, 

 which constitute the flagelkmi, are short, equal in leng-th, provided with minute hairs. 



The mouth-ovf/am will be described below at Vibilia robusta, p. 56. 



The 2)ereion; the first segment is shorter than the second, the fifth is the longest. 



The fir!<t 'pair of pi'iyto])iida (Pl. VII, hg. 5) are a little shorter than the second. 

 The tihia is feebh- produced at the hinder lower margin, the projection is shoi-ter than 

 half the earpns. Tlie carpus is shorter than the metacarpus, finely serrated along the 

 lower margins, and provided with sorae few strong spines at the lower corners. The 

 metacarpus is strongly serrated along the straight hinder margin and on the lower margins 

 round the base of the dactylus. The dactylus is verj' .stout, feebly bent, serrated along 

 the posterior margin; it is half as long as the metacarpus. 



The second pair (Pl. VII, fig. 6) with the tibial projection almost as long as the 

 carpus, broad at the apex, fringed Avith long stout spines. The hinder lower corner of the 

 carpus is produced into a stout, hollowed, spoon-shaped process, longer than half the me- 

 tacarpus; the mai-gins are sharply serrated. The metacarpus is broad, as long as the carpus, 

 strongly serrated along the hinder margin nnd round the base of the dactylus. The 

 dactylus is shorter than half the metacarpus, strongly serrated along the hinder margin. 



The third and fourth pairs (Pl. VII, tig. 7) are equal in length; the tibia is a little 

 longer than the carpus, hut nottumid; the metacarpus is longer than the carpus, strongly 

 serrated along the hinder margin. The dactylus is curved, scarcely as long as a third of 

 the metacarpus, with a few scrrations on the hinder concave margin. 



The pfth and si.rth pairs (Pl. \\\, tig. 8) are almost equal in length. The fem ur is 

 pretty broad, ovate. The tibia is a little longer than the carpus, smooth; the carpus 

 is shorter than the metacarpus; both joints are finely serrated along the anterior margins. 

 The metacarpus is much shorter than the two preceding joints together. The dactvlus 

 is very shoi^t, shorter than a fourth of the metacarpus. 



The screntli pair (Pl. VII, hg 9) are shorter than the fourth (7:9); the fe mur is 

 broad, laminar; the transformed dactylus is much longer than the metacarpus. 



The pleon is longer than the last four pereional segments; the hinder lateral corners 

 of the third segment are not produced backwards as in the preceding species. 



The peduncles of the plfopoda (Pl. VII, fig. 10) are shorter than the rami. The 

 rami consist of 12 — 13 joints; the ciline are much shorter than the rami. 



The second and third ural segments together are shorter than the first, the second 

 is shorter than the third. The hinder corners of the last segment are rounded, not produced. 



The uropoda (Pl. ^TI, fig. 11); the peduncles are much longer than the rami, pretty 

 broad, linear, the peduncle of the first pair is finely serrated on the outer margin. The rami 

 of each pair are equal in length, those of the first and second pairs are finely seri'ated 

 along both margins; the exteriör ranuis of tlie third paii- is smootli on the outer margin. 



The telson is broad, semicircularh' rounded, as long as the third ural segment, and 

 half as long as the peduncle of the last pair of uropoda. 



K. Sv. Vet. Akad. Haniil. Band. SI. N:o 5. 



