KONGL. SV. VET. AKADKMIKNS HANDLINGAR. BAND. 22. N:0 7. 315 



fully three-fourths as long as the stem of the joint, and its front side is three-fourths as 

 long as the hind margin of the metacarpus; the front margins of the process are fringed 

 with three spine-like bristles each. The metacarpus is a little longer than the stem of 

 the carpus; the front margin is feebly convex, and is armed with two bristles as in the 

 first pair; the hind margin is straight and smooth. The dactylus is feebly curved, and 

 has an obtuse tooth on the hind margin near the apex; it is half as long as the metacarpus. 



The third and fourth 'pairs (PI. XIII, fig. 55 and 56) are similar in form, but the 

 fourth pair are considerably longer than the third. The femur is elongated, narrow, and 

 is broader below than above, with a spine at the lower hind corner. The genu is a little 

 longer than broad, and is smooth. The tibia is longer than the genu. The carpus is 

 a little dilated, with the front margin convex, and the hind margin straight and armed 

 with a spine at the lower corner and a shorter one at the middle; in the third pair the 

 carpus is shorter than, in the fourth pair it is as long as, the two preceding joints together. 

 The metacarpus is feebly bent, slender, and armed on the hind margin with a few equi- 

 distant short spines; in the third pair it is longer than, in the fourth nearly as long as, 

 the twoo preceding joints together. The dactylus is feebly curved, smooth, and a third 

 part as long as the metacarpus. 



The fifth pair (PI. XIII, fig. 57) are half as long again as the fourth. The femur 

 is somewhat more than twice as long as broad at the apex where it is broader than at 

 the base; the front margin is feebly notched, with the lower corner sharp-pointed; the hind 

 margin is straight. The genu is longer than broad, and is smooth. The tibia is not 

 fully twice as long as the genu; the front margin is set with a few equidistant short hairs- 

 The carpus is longer than the two preceding joints together, and nearly twice as long as 

 the tibia; the front margin is sparingly set with very short hairs as in the preceding 

 joint. The metacarpus is much elongated, about as long as the two preceding joints 

 together, and has the front margin armed with short hairs as in those joints. The dac- 

 tylus is scarcely a sixth part at long as the metacarpus. 



The sixth and seventh pairs (PI. XIII, fig. 58 and 59) are similar in form, but un- 

 equal in length, the sixth being much the longest. The femur, genu, and tibia are 

 like those joints in the fifth pair. The carpus is nearly as long as the two preceding 

 joints together. The metacarpus is shorter than the carpus and tibia together. The 

 dactylus is about a fourth part as long as the metacarpus. 



The pleon is unusually large; the first segment is longer than the last two pergonal 

 segments together. The lateral parts of the first two segments are broadly rounded be- 

 hind; that of the third is somewhat produced baclcwards, and obtusely rounded. 



The pleopoda (PI. XIII, fig. 60 and 61) are tolerably large. The coupling 

 spines (PI. XIII, fig. 60) are slender, with a small heed, and three hooks on the stem. 

 The cleft bristle (PI. XIII, fig. 61) is very thick at the base, and has short arms. Both 

 rami of the first pair are eight-jointed. 



The urus is quite as long as the last pleonal segment; the first ural segment is 

 somewhat longer than the last coalesced, which is a third part broader than long. 



The uropoda (PI. XIII, fig. 62). The first pair reach nearly to the apex of the 

 last. The peduncle is linear, and about five times as long as broad; it is finely serrrated 



