11. Richardson — Isopods of the Bermudas. 285 



The first pair of antennoe liave the basal joint long, oblong in 

 shape, the other two joints of the peduncle being short and about 

 equal in length ; the flagellum consists of nine joints. 



The second pair of antennie have the second joint of the peduncle 

 very long, slightly exceeding in length the first and second pedun- 

 cular joints of the first j^air of antennae. The second antennte are 

 geniculate at the articulation of the second and third joints. The 

 other three joints, following the second, are of nearly equal length. 

 The flagellum consists of a single tapering joint, furnished with 

 hairs. 



The first three thoracic segments are about equal in length, 

 elongate, the first two having their posterior angles rounded. The 

 fourth, fifth and sixth segments are equal in length, and one- 

 third shorter than the first three. The seventh segment is about half 

 as long as the preceding one, and has the posterior angles produced 

 downwards. 



The segments of the abdomen are distinct, and very short, all five 

 anterior to the terminal segment being no longer than half the length 

 of the seventh thoracic segment. The terminal segment is long and 

 narrow, of the same width throughout its length, except at the apex, 

 whei'e the lateral margins are abruptly drawn out into processes, 

 which curve upwards, giving a funnel-shaped appearance to the pos- 

 terior end of the segment, which is very concave. The posterior 

 margin is truncate and coarsely denticulate. 



The inner branches of the uropoda do not quite reach the extremity 

 of the terminal abdominal segment. The basal joint is about half 

 the length of the terminal abdominal segment. The inner branch is 

 extremely concave, with its entire margin denticulate, its ventral sur- 

 face having a longitudinal carina. The outer and superior branch is 

 long and narrow, quadrangular and somewhat narrowed posteriorly, 

 and from the middle slightly curving upward, coarsely denticulate on 

 its inner lateral and posterior margin, the teeth being rather widely 

 separated. The branches of the uropoda and the terminal abdominal 

 segment are fringed with hairs. 



The first, second aud third pairs of legs are sub-cheliform. The 

 second and third pairs have the propodus similar in shape to the first 

 pair, but more slender and armed on their posterior margin Avith 

 seven or eight large conspicuous spines. The other legs are longer 

 and more slender, and armed with four spines on the anterior margin 

 of both the cai'pus and the propodus. 



