92 



CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. 



HYPERIIOiE. 



1. 



Hyperoche Kroeyeri. 



9 

 The body is thick, tumid. 



The first pair of antennas 

 are fixed high up at the middle 

 of the front side of the head; 

 the are fully as long as the 

 head. 



The third and fourth pairs 

 of perceopodahoNe, the carpus 

 very dilated, elongate- ovate, 

 narrower at the lower end, 

 not produced, the hind margin 

 is strongly curved, set with 

 long bristles; the metacar- 

 pus is as long as the carpus, 

 armed with short bristles. 



The fifth, sixth and seventh 

 pairs are elongate, consider- 

 ably longer than the two next 

 preceding pairs; the femur 

 is about seven or eight times 

 as long as the genu; the 

 tibia is more than twice as 

 long as the genu; the carpus 

 is longer than the genu and 

 tibia together; the meta- 

 carpus is longer than the 

 femur, the front margin set 

 with bristles. 



The outer ramus of the 

 first pair of uropoda is con- 

 siderably shorter than the 

 inner one. *) 



Hyperoche Luetkeni. 



9 

 The body is thick, tumid. 



The first pair of antennae 

 are fixed considerably below 

 the middle of the front side 

 of the head; they are shorter 

 than the head. 



The third and fourth pairs 

 of peroBopoda have the carpus 

 somewhat dilated, broader at 

 the lower end, which is pro- 

 duced into a sharp-pointed 

 process, the hind margin is 

 straight, sharply serrated; 

 the metacarpus is consider- 

 ably longer than the carpus, 

 serrated. 



The fifth, sixth and seventh 

 pairs are scarcely longer than 

 the two next preceding pairs; 

 the f e mu r is about four times 

 as long as the genu; the tibia 

 is scarcely more than one- 

 third longer than the genu; 

 the carpus is shorter than 

 the genu and tibia together; 

 the metacarpus is much 

 shorter than the femur, the 

 front margin entirely smooth. 



The outer ramus of the 

 first pair of uropoda is almost 

 as long as the inner one. 



3. 

 Hyperoche ahyssorum. 



9 

 The body is very com- 

 pressed. 



The third and fourth pairs 

 of peraeopoda, have the c ar p u s 

 narrow linear, the lower 

 hinder corner scarcely pro- 

 duced, the hind margin is 

 straight, serrated; the meta- 

 carpus is considerably long- 

 er than the carpus, serrated. 2 ) 



The fifth, sixth and seventh 

 pairs are scarcely longer than 

 the two next preceding pairs, 

 the femur is about five times 

 as long as the genu; the tibia 

 is nearly twice as long as 

 the genu; the carpus is as 

 long as the genu and tibia 

 together; 2 ) the metacarpus 

 is much shorter than the 

 femur, the front margin ser- 

 rated. 



The outer ramus of the 

 first pair of uropoda is con- 

 siderably shorter than the 

 inner one. 



1 ) This characteristic is taken from the drawing of Kroeyer, reproduced above, p. 87, fig. 1. 



2 ) Some of these characteristics are taken from the drawing of Boeck, reproduced below, p. 94; see 

 also the traduction of the original description below, p. 96. 



