ISOPOD3 OF NORTH AMERICA. 77 



joints of the first pair of antennas. The second antennae 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 downward. 



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, 

 where the lateral margins are abruptly drawn out into processes, which 

 curve upward, giving a funnel-shaped appearance to the posterior end 

 of the segment, which is very concave. The posterior margin is trun- 

 cate 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, and third pairs of legs are subcheliform. The 

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

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

 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 carpus and the propodus. 



A number of specimens, all males, were collected by Dr. George 

 Brown Goode in 1876-77 at the Bermudas. 



Type specimens in Peabody Museum, Yale University. Cat. No. 

 3207. 



PARANTHURA VERRILLII Richardson. 



Paranthura verrillii RICHARDSON, Trans. Conn. Acad. Sciences, XI, 1902, p. 286, 

 pi. xxxvm, figs. 21-22. 



Locality. Bermudas. 



Body narrow, elongate. Color dark brown, with scattered black 

 dots. 



Head with lateral angulations prominent, rounded, between which 



