64 CARL B0VALL1US, AMPHIPODA HYPERIIDEA. VIBTLTD^E. 



The head is deeper than long, the anterior margin is straight. 



The eyes are ovate, occupying a little more than half the depth of the head. 



The first pair of antenna? (PI. IX, fig. 2) are quite as long as the head and the first two 

 pereional segments together. The first joint of the peduncle is as long as the two following 

 joints together. The first joint of the flagellum is more than twice as long as the peduncle. 



The second pair of antennas (PI. IX, fig. 3) are ten-jointed in the male and five- 

 jointed in the female; in the male the third joint of the peduncle is angularly bent against the 

 preceding joint, a fact which points to the case of the Tryphwnidce and following families. 



The pereion; the first segmenf is shorter than the second, the fifth is the longest, 

 the seventh scarcely shorter. 



The epimerals are rather small, those of the sixth pair are the deepest. 



The first pair of pereiopoda (PL IX, fig. 4) with the carpus broad, but not produced 

 shorter than the metacarpus. The metacarpus has the hinder margin feebly concave, 

 finely serrated; the dactylus longer than half the metacarpus, serrated. 



The second pair (PI. IX, fig. 5); the tibial process is longer than half the carpus, tipped 

 with long thick bristles. The carpal process is as long as two thirds of the metacarpus, 

 narrowly spoon-shaped, the margins serrated. The hinder margin of the metacarpus 

 is straight, strongly serrated. The dactylus as in the preceding pair. 



The third and fourth pairs (PI. IX, fig. 6) with the femur narrow, feebly bent. The 

 tibia is very large and thick, tumid, much broader and longer than the following carpus. 

 The metacarpus is very stout, finely serrated and spinous along the hinder margin. The 

 dactylus is very long, almost as long as the metacarpus, smooth. 



The fifth and sixth pairs (PI. IX, fig. 7 and 8) with the femur irregularly ovate, 

 provided with four to five short spines at the lower anterior corner. The tibia is a little 

 longer than the carpus. The carpus of the sixth pair is provided with six long, equidi- 

 stant bristles. The metacarpus is scarcely a third longer than the carpus, finely serrated 

 along the anterior margin. The dactylus is somewhat shorter than the metacarpus. 



The seventh pair(P\. IX, fig. 9, 10 and 11); the femur is a fourth longer than broad, 

 a little longer than the three following joints. The d act)- Ins is as long as two thirds of 

 the metacarpus. 



The pleon is a little shorter than the last five pereional segments; the inferior margins 

 of the segments are a little excavated. 



The rami of the pleopoda (PI. IX, fig. 12) are ten- to twelve-jointed. 



The urus is as long as the last pleonal segment. The first segment is longer than 

 the two following together, the third is more than twice longer than the second. The hinder 

 corners of the last segment are feebly rounded. 



The uropoda (PL IX, fig. 13). The exterior rami are a little shorter than the interior; 

 those of the first two pairs are finely serrated along both margins. The exterior ramus of 

 the last pair is smooth on the outer, and finely serrated on the inner margin; the interior 

 ramus is smooth on the inner margin, and finely serrated on the outer; the peduncle 

 is longer than the last two ural segments. 



The telson is longer than the last ural segment. 



