238 CARL BOVALLIUS, AMPHIPODA HYPEPJIDEA. I. 2. HYPEPJID^E. 



Hyperia Gilesi. 



The perceon. The coalesced portion is scarcely longer than the last two segments 

 together. 



The epimerals of all the segments are distinct, and as long as the under margins 

 of the corresponding segments. 



The first pair of perceopoda. The femur is longer than all the following joints 

 together, and almost linear. The lower hind corner of the tibia is only a little produced, 

 and armed with a single bristle. The carpus is longer than the two preceding joints 

 together; the front margin is feebly convex; the hind margin is straight, and provided 

 with a single bristle; the front side of the carpal process is fully half as long as the 

 hind margin of the metacarpus, the margins being set with a few short spines. The 

 metacarpus is somewhat longer than the stem of the carpus; the hind margin is feebly 

 serrated. The dactylus is half as long as the metacarpus. 



The second pair are longer, and more robust, than the first pair. The femur is 

 nearly as long as all the following joints together. The carpus is much dilated and 

 produced; the hind margin carries a single bristle; the front side of the carpal process 

 is longer than two-thirds of the hind margin of the metacarpus. The metacarpus is 

 as long as the stem of the carpus; the hind margin is feebly serrated. The dactylus 

 is about half as long as the metacarpus. 



The third and fourth pairs. The femur is narrow, almost linear, with a single 

 bristle at the lower hind corner. The genu is as long as broad, with a bristle at the 

 lower hind corner. The tibia is longer, but not broader, than the genu, and is armed 

 in the same way. The carpus is narrow, linear, and fully as long as the two preceding 

 joints together; the hind margin is smooth. The metacarpus is only a little longer 

 than the carpus, with the hind margin smooth. The dactylus is nearly half as long as 

 the metacarpus. 



The fifth, sixth, and seventh pairs. The femur is laminar, dilated, not twice as 

 long as broad, and about as long as the three following joints together. The genu is 

 as long as broad, and carries a single bristle at the lower front corner. The tibia is 

 more than twice as long as the genu, and is armed in the same way. The carpus is 

 a little longer than the tibia, and has the margins smooth. The metacarpus is longer 

 than the carpus; the front margin is smooth. The dactylus is as long as a third part 

 of the metacarpus. 



The pleon is much longer than the perason. The first segment is shorter than the 

 last two pereeonal segments together. The lateral parts of the segments are rounded 

 behind. 



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



The urus is longer than the last pleonal segment. The first ural segment is a little 

 longer than the last coalesced, which is broader than long. 



The uropoda. The first pair reach almost to the apex of the last; the peduncle is 

 linear, more than four times as long as broad, and nearly twice as long as the inner 

 ramus; the rami are elongate-lonceolate, equal in length, and with serrated margins. The 

 second pair reach to the middle of the outer ramus of the last pair; the peduncle is 

 shorter than that in the first pair, three times as long as broad, and much longer than 



