114 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. HYPERIID.ZE. 



Ilyperoche picta. 



and almost rectangularly bent over the base of the dactylus; the apex of this process is 

 tipped with four to five bristles, the inner hind margins of the process, especially at the 

 base, are provided with some short, sharp teeth. The dactylus is straight, slender, sharp- 

 pointed, nearly half as long as the metacarpus. It is not unlikely that the dactylus here 

 as also in the first pair is able of being retracted in the interior of the metacarpus, in 

 the same way as described by Stebbing for Hyperoche cryptodactylus, because the end of 

 the metacarpus seems to form a wide hole around the base of the dactylus, and does not 

 show any distinct points of articulation with it. Well developed glands exist in all the 

 joints, except in the dactylus. 



The third and fourth pairs are equal in length and similar in shape. The femur 

 is narrow, almost linear, more than three times as long as broad, smooth. The genu is 

 almost as broad as long. The tibia is twice as long as the genu, the margins are smooth. 

 The carpus is scarcely longer than the tibia, somewhat dilated, the hind margin is 

 straight, longitudinally cleft into two thin edges, just as in Hyperoche Luetkeni, the outer 

 edge is sparingly set with hairs, the inner one is microscopically serrated, the teeth being 

 rounded, not sharp-pointed; between these edges a part of the hind margin of the meta- 

 carpus is received, thus forming a kind of cutting organ; the lower corners of the edges 

 are almost rectangular, not produced into serrated processes as in Ilyperoche Luetkeni. 

 The metacarpus is long, not fully as long as the tibia and carpus together, the sides 

 of the joint are richly covered Avith long, sharp, spine-like bristles, the hind margin forms 

 a thin edge, microscopically serrated, with rounded teeth. The dactylus is straight, it 

 equals in length fully a third of the metacarpus. Powerful glands as in the two 

 preceding pairs. 



The fifth, sixth and seventh pairs equal the two next preceding pairs in length. 

 The femur is narrow, linear, more than three times as long as broad. The genu is 

 more long than broad. The tibia is somewhat longer than the genu. The carpus is much 

 longer than the tibia, linear; the margins are smooth. The metacarpus is longer than 

 the carpus, but not as long as the metacarpus of the third and fourth pairs; the front 

 margin is somewhat concavated, smooth. The dactylus is straight, scarcely equalling in 

 length a third of the metacarpus. Glands in all the joints, except in the dactylus. 



The pleon is a little shorter than the peraeon; the segments are equal in length, 

 the lateral parts are deep, rounded. 



The pleopoda have the peduncles almost globular, shorter than the rami, the outer 

 ramus has nine, the inner eight joints. The coupling spines are stout, the tip bent as 

 a hook, the cleft bristle is very thick and stout. 



The urus is scarcely longer than the last pleonal segment; the last coalesced segment 

 is almost as long as the first one, and nearly twice as broad as long. 



The uropoda (PI. VII, fig. 35). The first pair reach to the middle of the outer 

 ramus of the last pair; the peduncle is broader below, considerably longer than the inner 

 ramus; the rami are narrowly lanceolate, equal in length; the outer ramus is fully as long 

 as the inner, the outer margin is smooth, the inner one sharply serrated; the inner ramus 

 is sharply serrated along both margins. The second pair reach fully as far as the first 

 pair; the peduncle is as broad as that of the preceding pair, only a little longer than 



