KONGL. SV. VET. AKADEMIENS HANDL1NGAR. BAND. 22. N:0 7. 173 



The dactylus is more than half as long as the metacarpus, and serrated along the upper 

 half of the hind margin. Glands as in the first pair. 



The third and fourth pairs (PI. X, fig. 9). The femur is elongate-ovate; the hind 

 margin is feebly notched, and set with from six to nine very short spines; the lower corner 

 carries three or four unequal bristles; the front margin is smooth. The genu is about 

 as long as broad; the lower hind corner with three or four bristles. The tibia is con- 

 siderably longer than the genu; the hind margin carries four or five very short bristles. 

 The carpus is a little longer than the tibia; the hind margin is armed with six or eight 

 unequal bristles in the third pair, and with three or four bristles in the fourth pair; the 

 longest of these bristles are much shorter than the breadth of the joint. The metacarpus 

 is more slender than the carpus, and much longer, but not as long as the carpus and 

 tibia together; the hind margin is slightly curved, without bristles; it is minutely serrated 

 in the third pair and less distinctly serrated in the fourth. The dactylus is curved, and 

 somewhat shorter than a third of the metacarpus. Glands are present in all the joints, 

 except in the dactylus. 



The fifth, sixth, and seventh pairs (PI. X, fig. 10 — 12) are a little shorter than the third 

 and fourth pairs. The femur is shorter and not broader than that in the preceding pair; 

 the front margin is slightly curved and smooth; the hind margin is almost straight. The 

 genu is as long as broad. The tibia is much longer than the genu, and smooth. The 

 carpus is longer than the tibia, and smooth; it is a little thicker and shorter in the seventh 

 pair than in the two preceding, but nevertheless longer than the tibia. The metacarpus 

 is longer than the carpus and more than half as long as the femur, but shorter than the 

 metacarpus in the third and fourth pairs; the front margin is entirely smooth. The dac- 

 tylus is slightly curved, smooth, and equal in length to about a fourth of the metacarpus. 

 Glands as in the preceding pairs. 



The pleon equals in length the last five peraeonal segments together. The lateral 

 parts of the pleonal segments are feebly rounded below; the hind corners are angular. 



The pleopoda. The outer ramus of the first pair has fifteen joints, the inner 

 fourteen. 



The uncs is as long as the last pleonal segment and half the preceding. The first 

 1.1 ral segment is a little longer the last coalesced one; this latter is about twice as broad 

 as long. 



The uropoda (PI. X, fig. 13). The first pair reach to the middle of the outer 

 ramus of the last pair; the peduncle is linear and more than three times as long as broad; 

 the rami are almost equal in length, elongate-lanceolate, and nearly as long as the ped- 

 uncle: the outer ramus is smooth along the outer margin and serrated along the inner; the 

 inner ramus is serrated along both margins. The second pair come short of the middle of 

 the outer ramus of the last pair; the peduncle is broader at the apex than that of the first 

 pair, narrower at the base, and more than twice as long as broad at the apex; the outer 

 ramus is shorter and narrower than the inner, serrated on the inner margin and smooth 

 along the outer; the inner ramus is lanceolate, sharp-pointed, serrated along both marg- 

 ins, and only a little shorter than the peduncle. In the third pair the peduncle is very broad 

 at the middle and at the apex, but narrowed at the base; it is scarcely more than a third 



