66 CARL BOVALIJUS, AMPHIPODA HYPKRIIDEA. VIBILID^E. 



as the second. The flagellum is slender, evenly tapering towards the point, considerably 

 longer than the peduncle (12:7); the two terminal joints are distinct. (PL IX, tig. 19). 



The second pair of antenna? (PI. IX, fig. 15) are live-jointed in the female, the basal 

 joint is the shortest. 



The first and second segments of the pereion are equal in length, shorter than the 

 others; the fifth segment is the longest, the two succeeding ones scarcely shorter. 



The carpus of the first pair of pereiopoda (PI. IX, fig. 20) is a little shorter than 

 the metacarpus, the posterior margin straight, smooth; at the lower posterior corner there 

 is a single bristle. The posterior margin of the metacarpus is straight, regularly serrated. 

 The dactylus is shorter than half the metacarpus, serrated at the posterior margin. 



The second pair (PI. IX, fig. 21) have the carpus and metacarpus equal in length; 

 the carpal process is almost as long as the posterior margin of the metacarpus, regularly 

 serrated. 



The third and fourth pairs (PI. IX, fig. 22) have the tibia a little longer than the 

 carpus, not tumid; the metacarpus is robust, minutely serrated along the posterior margin; 

 the dactylus is only a fourth shorter than the metacarpus. 



The fifth and sixth pairs (Pi. IX, fig. 23 — 25) are almost equal in length, a little 

 longer than the fourth pair (16:13); the margins of the tibia and carpus are smooth, the 

 anterior margin of the metacarpus is minutely serrated, or rather armed with a dense 

 row of very short regular spines. The dactylus is about as long as half the metacarpus, 

 provided with a short row of sharp spines at the anterior margin. 



The. seventh pair are shorter than the fourth; the femur is much longer than the three 

 succeeding joints together. In a young specimen the dactylus carries a curved spine sub- 

 apically and a row of short hairs. (Pi. IX, fig. 26.) 



The pleon is as long as the last four pereional segments; the lower margins are 

 straight, smooth. 



The peduncles of the pleopoda are longer than the rami. The outer ramus is 9-jointed, 

 the inner 10-jointed. (Pi. IX, fig. 27.) 



The second and third ural segments are coalesced, shorter than the first. The hinder 

 corners are a little produced backwards, but not so far as half the length of the telson. 



The peduncle of the first pair of uropoda (PI. IX, fig. 28) is longer than the 

 rami, linear, not broader than the peduncle of the second pair. The rami of the first 

 two pairs are lanceolate, coarselv serrated along both margins; the exterior ones are a little 

 shorter than the interior. The peduncle of the third pair is considerably longer than 

 the rami, as broad the peduncle of the preceding pair, but shorter than the last coalesced 

 ural segment. The rami are shortly lanceolate; the interior is the longest, minutely serrated 

 along both margins; the exterior is smooth along the outer margin, minutely serrated along 

 the inner. 



The telson is almost circular, longer than half the peduncle of the last pair of uropoda. 



