52 CAKL BOVALLIUS, AMPHIPODA HYPERIIDEA. VIBILID^E. 



The second pair of antennae are five-jointed in the female, the last joint is the shortest. 



The first pereional segment is only a little shorter than the second, the fourth seg- 

 ment is the longest. 



The second pair of pereiopoda (PI. VIII, fig. 3) have the femur narrow, linear, as 

 long as all the following joints together. The hinder lower corner of the tibia is scarcely 

 produced. The carpal process is scarcely as long as a third of the metacarpus, not ser- 

 rated. The metacarpus is as long as the carpus, smooth; the dactylus is stout, longer 

 than two thirds of the metacarpus. 



The third and fourth pairs (PI. VIII, fig. 4 and 5) are very robust; the tibia is 

 very broad but not tumid, a little longer than the carpus; the metacarpus is very thick, 

 not serrated, but provided with some few minute bristles; it is longer than the carpus. 

 The dactylus is long and strong, longer than half the metacarpus. At its base then; is a 

 large hole, through which the secretion of the well-developed metacarpal glands passes out. 



The, fifth and sixth pairs (PI. VIII, fig. 6). The metacarpus is a little longer than 

 the carpus, provided with some short, equidistant, minute bristles along the anterior margin. 

 The dactylus is smooth, as long as a third of the metacarpus. 



The seventh pair are not fully developed, as the specimen examined is very young, 

 the femur is broad, linear, with rounded corners. 



The pleon is about as long as the last four pereional segments together. 



The peduncles of the pleopoda are longer than the rami. The outer ramus is 8- 

 jointed, the inner 9-jointed; at the base of the outer ramus there is to be seen a little 

 appendicular tubercle or process without hairs, which may possibly be the same organ that 

 is mentioned by Milnk Edwards in Vibilia Peroni 1 ) (PI. VIII, fig. 7). 



The second and third aval segments are coalesced, about as long as the first. 



The peduncle of the first pair of uropoda (PI. VIII, fig. 8) is very broad, shorter 

 than the rami (8:9), the rami are equal, coarsely serrated along both margins, with the 

 serrations of the outer margin again finely serrated. The peduncle of the second pair is 

 narrowed above, a fourth shorter than the rami; the exterior ramus is coarsely serrated 

 along the outer margin and finely serrated along the inner; the interior ramus is finely 

 serrated along the outer margin, the inner smooth. The peduncle of the third pair is 

 a little longer than the rami (8:7), pretty broad, linear, exactly as long as the last ural seg- 

 ment; the exterior ramus is almost smooth on the outer margin, finely serrated along the 

 inner. The interior ramus is a little shorter than the exterior, finely serrated at the apex. 



The telson is short, almost semi-circular, scarcely longer than a third of the pe- 

 duncle of the last pair of uropoda. 



*) Histoire naturelle des Crustac6s. Tome 3 me , p. 73. PI. 30, fig. 3 a. 



