KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 21. N:0 5. .33 



thin margin the joint thickeiis abruptly and is frinoed with long slender hairs. Against 

 this wall the tibia impinges when the leg is folded up. The hinder margin is feebly curved, 

 coarsely serrated, and fringed with hairs. The tibia is longer than the carpus (24:19); 

 both carry a few short hairs along the hinder margins. The metacarpus is narrow» 

 linear, as long as the carpus. The dactylus is small, feebly curved, fixed as usual 

 terminally at the tip of the metacarpus. 



The fifth pair are longer than the fourth (8: 7), but much shorter than the sixth (2:3). 

 The femur is long, linear; the tibia is longer than the carpus; the metacarpus is a 

 little shorter than the carpus; the dactylus has the same articulation and form as that de- 

 scribed below in the sixth pair. 



The sixth pair (Pl. IV, fig. 17) are only a little longer than the pereion (36:35). 

 The femur is tolerably broad, linear, the anterior and posterior margins are straight: 

 the tibia and carpus are almost equal in length, the mai'gins smooth. The metacarpus 

 is elongated, slender; the lower end is rounded, deeply hollowed on the anterior side, 

 forming a spacious pit for the reception of the dactylus when this joint is retracted. The 

 dactylus is fixed subterminally, a little above the rounded lower end; it is strongly 

 curved, of the same form as the claw of a cat, very sharp-pointed; the inner concave 

 margin is beset with long spines. 



Thé seventh pair (Pl. IV, fig. 18 and 19) are scarcely a sixth shorter than the fourth 

 pair, and exactly half as long as the sixth pair. The tibia is longer than the carpus; 

 the carpus equals two thirds of the length of tlie metacarpus. The lower end of the 

 metacarpus is a little broader, hollowed as in the preceding pair. The dactylus is fixed 

 as in the sixth pair, the concave margin indistinctly serrated. 



The pleon is niuch shorter than the last three pereional segments (10:14), the dorsal 

 line shows no serration; the lateral parts of the segments are evenly rounded belo^v. 



The pleopoda are provided with long, narrow peduncles, a little shorter than the 

 rami; the outer ramus has 16 — 17, the inner 20 — 22 joints ; the cilia? are shorter than 

 the rami, simple, shortly plumose. 



The urux, -without the telson, is shoi-ter than the last tAvo pleonal segments. The 

 second and third ural segments are coalesced into one, scarcely longer than the first segment. 



The uropoda (Pl. V, fig. 1) are short and broad, the peduncles are thick, almost 

 prismatic; the peduncles of the first and second pairs are finely serrated along the outer 

 margins and provided with a few hairs along the inner. The peduncle of the third 

 pair, scarcely longer than the last ural segment, is smooth on the outer margin and 

 spai'ingly beset with hairs along the inner. The rami of the first pair are equal in length, 

 acute, serrated. The exteriör rami of the last two pairs are a little shorter than the interiör, 

 serrated along the inner margins; the interiör rami are acute, serrated along both margins. 



The telson is long, broad, feebly serrated behind; it is longer than the peduncle of 

 the last pair of uropoda. 



K. Vet. Akad, Handl. Band 21. \':o 5. 



