380 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. PHRONIMIDiE. 



Phronima Colletti. 



The fifth pair (PI. XVI, fig. 47) do not reach to the apex of the carpus in the 

 fourth pair. The femur is straight, much broader below than above; the lower hind 

 corner is rounded, not produced as in Phronima sedentaria; the femur is longer than the 

 tibia and carpus together. The genu is nearly twice as long as it is broad below. The 

 tibia is very broad, with the hind portion dilated and the hind margin strongly convex. 

 The carpus is as broad as long, with the hind margin strongly convex and the front 

 margin nearly straight; on the under margin there are three sharp-pointed tubercles, 

 similar in shape and equal in length; the carpal process is very short, being scarcely a 

 fourth part as long as the stem of the joint. The metacarpus is arched, smooth, without 

 tubercle or intumescence on the front margin; it is shorter than the stem of the carpus, 

 and does not reach beyond the front margin of the carpus when folded up. 



The sixth pair reach beyond the apex of the tibia in the fifth pair, but do not 

 attain the middle of the carpus. The femur is comparatively broad, being about three 

 times as long as broad, with the margins feebly convex; the lower front corner is obtuse; 

 the femur is as long as the three following joints together. The genu is as long as 

 broad, with the lower front corner obtuse. The tibia is a little longer than the genu. 

 The carpus is much longer than the two preceding joints together. The metacarpus 

 is shorter than the carpus. The dactylus is tolerably long, being about a fourth part 

 as long as the metacarpus. 



The seventh pair are as long as the sixth. The femur is scarcely longer than 

 that in the preceding pair, and of the same shape. The following joints are like those 

 in the sixth pair. 



The pleon is as long as the last four pergonal segments together; the first pleonal 

 segment is considerably shorter than the last pergonal. The lower hind corner of the 

 three segments is rounded. 



The urus is quite as long as the last pleonal segment; the first ural segment is 

 nearly twice as long as the last coalesced, which is broader than long. 



The uropoda. The first pair reach to the apex of the third ; the peduncle is nearly 

 twice as long as the inner ramus; the rami are equal in length. The second pair reach 

 beyond the middle of the outer ramus in the last pair; the peduncle is much longer than 

 the inner ramus, but not twice as long; the inner ramus is a trifle longer than the outer. 

 The peduncle of the third pair is about a fourth part longer than the inner ramus; the 

 rami are equal in length. 



The telson is about as long as broad, and is more than half as broad as the lower 

 part of the last ural segment. 



The male. 



PI. XVI, fig. 27—43. 



The body is thick and robust; the head and perseon together are as long as the 

 pleon and urus together. 



