KONOL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. ^17 



with two stout spines; the hind margin is slightly concave, and serrated with simple teeth. 

 The dactylus is strongly cuvved, neai-ly lialf as long as the metacarpus, and is finely 

 serrated on the hind margin. Glands are present in all the joints except the dactylus. 



The thircl and fourth pairs are somewhat longer than the second. The fem ur is 

 feebly bent at the apex, the front margin is slightly convex; the hind margin is almost 

 straight; the feraur is a little broader at the apex than at the base; it is much more than 

 three times as long as it is broad at the apex, and quite as long as the four followin^ 

 joints together. The genu is longer than broad, with a minute spine at the lower hind 

 corner. The tibia is a little longer than the genu, with the front margin more convex 

 than the hind, which carries three or four minute spines. The carpus is quite as long 

 as the preceding joints together, and fully as broad as the tibia; the hind margin is straight, 

 serrated, and armed Avith a spine-like bristle at the lower corner and another above near 

 the middle. The metacarpus is longer than the carpus but scarcely more than half 

 as wide; it is more than half as long as the femur; the hind margin is slightly concave, 

 and finely serrated. The dactylus is less curved than in the two preceding pairs, nearly 

 half as long as the metacarpus, and provided with slender, spine-like teeth on the 

 hind margin. 



The fifth, fiixth, and seventh pairs are a little longer than the two preceding. The 

 femur is much broader than that in the third and fourth pairs, tolerably narrow at the 

 base, .broadening downwards, with convex margins, and almost truncated below; it is about 

 twice as long as broad, and shorter than the three following joints together; the front 

 margin is provided with four or six short bristles. The genu is somewhat longer than 

 broad, and is smooth. The tibia is tolerably broad, about twice as long as the genu, 

 and has the front margin faintly serrated. The carpus is somewhat longer, but a little 

 narrower than the tibia; the fi^ont margin is serrated. The metacarpus is somewhat 

 longer than that joint in the third and fourth pairs, longer than the carpus, and much 

 more than half as long as the femur; the front margin is serrated. The dactylus is as 

 long as a third of the metacarpus. Tn the joints of these pairs, as well as in those of 

 the four preceding, there are to be seen at the side of the glands calcareous concrements 

 forming balls or irregularly star-like bodies (Pl. XI, lig. 4, 6, 7, 9, 12 and 13). For 

 further remarks on these concrements see the third section of this treatise. 



The pleon is quite as long as the head and person together; the first segment is 

 somewhat longer than the last tAvo pera^onal segments together. The lateral parts of the 

 first and third segments are more eveidy rounded behind than that of the second. 



The pleopoda (Pl. XI, fig. 10 and 11). The coupling spines are stout, and pro- 

 vided Avith a hook-like projection at the middle of the stera. The cleft bristle is sparingly 

 set Avith hairs on the basal portion. The outer ramus of the first pair has ten joints, 

 the inner nine. 



The urus is a little more than half as long as the last pleonal segment. The first 

 segment is about tAvice as long as the last coalesced, Avhich is broader than long. 



The uropoda. The first pair reach a little below the middle of the outer ramus of 

 the last pair; the peduncle is narroAv, linear, fully four times as long as broad, and much 



K. Sv. A^et. Akad. Hnndl. Band. 22. N:o 7. ^° 



