KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 213 



allies, H. Fabrei and H. promontorii. The species doubtfully given by Stebbing (1. c. p. 

 1384) as »Hyperia luzoni, young male?» belongs probably not to this species, but from 

 the shortness of the description it is impossible to judge where it ought to be placed 

 if it were to be made an independant species. The statement that the mandibles want 

 a palp is curious, and contrary to what is known of all the other species of Hyperia. 

 The unusual length of the telson is also a striking feature. 



The male. 



The body. The head and perseon together are scarcely longer than the pleon. 



The head is longer than the first four perseonal segments together. The antennal 

 groove commences at the middle of the front side. 



The first pair of perceopoda. The femur is shorter than the four following joints 

 together. The carpus is only a little dilated, and scarcely produced. The metacarpus 

 has three distinct notches on the hind margin, each carrying a short spine; the front margin 

 has a single, long bristle. The dactylus is much more than half as long as the meta- 

 carpus, and is smooth. 



The second pair reach fully to the apex of the carpus of the third pair. The femur 

 is as long as the four following joints together. The carpal process is only a little longer 

 than a third of the hind margin of the metacarpus. The metacarpus is longer than the 

 stem of the carpus; the hind margin is smooth; the front margin carries two long bristles. 

 The dactylus is nearly as long as the metacarpus. 



The third and fourth pairs. The femur is longer than the three following joints 

 together. The carpus has one shorter bristle in the middle of the hind margin, and one 

 longer at the lower corner, which last bristle is longer than the breadth of the joint. 

 The metacarpus is not much narrower than the carpus, and about as long as the two 

 preceding joints together; the hind margin is faintly serrated. The dactylus is as 

 long as two-thirds of the metacarpus. 



The fifth, sixth, and seventh pairs. The femora of the fifth and seventh pairs have 

 the same breadth, while that of the sixth is narrower; the femur is fully as long as the three 

 following joints together. The carpus of the fifth and sixth pairs is as long as the tibia, 

 that of the seventh is considerably shorter. The metacarpus is shorter than that joint 

 in the third and fourth pairs, and much shorter than the two preceding joints together, 

 and is smooth. The dactylus is more than half as long as the metacarpus. 



The pleon. The first segment is only a little shorter than the last three pergonal 

 segments together. 



The urus is considerably longer than the last pleonal segment. The first ural seg- 

 ment is almost twice as long as the last coalesced, which is much broader than long. 



The uropoda. The first pair reach further back than the third; the peduncle is 

 three times as long as broad; the inner ramus is shorter than the peduncle, but longer than 

 the outer ramus; the rami are elongate, sharp-pointed. The second pair reach almost to 

 the middle of the outer ramus of the last pair; the inner ramus is longer than the outer, 



