

• " - 



characteristi ich spe» variaus or /'. japonicus. The hrst cirrus 



lent is very short, th< ot so long as broad, the third nearly or quite t \\ i< < as long 



as th<- proximal diameter, the fourth and following aboüt fout times as long .ts the median 

 diameter; the sixth-eighth iegments are the longest, the length from that point onward diminishing 

 almost imperceptil eventeenth and following are slightly over twice as long as 



id and i as long as broad, tapering somewhat distally; theopposing 



spim mail rounded subterminal tubercle; the terminal claw is slighdy longer 



than the penultimal tent, very slender, very sharp, and only slightly curved. The second 



and third cirrus segments are rather stronglj constricted 

 centrally; the sixth and following have moderatel) expanded 

 and slightly overlapping distal ends, this character gradually 

 dying away distally. The cirri are rather strongly com 

 pressed laterally from the fifth segment onward. 



The radials are just visible beyond the edge of the 

 centrodorsal ; their distal border is swollen and everted, 

 smooth or evenly tuberculated. 



The IBr series (th<- lust two ossicles following the 

 radials) forms an oblong unit which is not quite twice as 

 l>road as long: both the proximal and distal borders are 

 turned ontward, the former slightly. bul the latter standing 

 up at right angles to the general sin face of the segment, 

 ^l^Eudioa-inus/unceus with a smooth and somewhat thickened edge ; the proximal 

 l size. (Courtesy of the U.S. border mav bc more or less scalloped, and it bears just 



n). 



within it a prominent rounded tubercle; the produced distal 

 is thickest and most prominent in the middorsal half, this portion being evenly concave; 

 the remainder of the distal edge may be irregularly scalloped. 



The five arms are 90 mm. long; the first brachial is oblong, two and one half to three 



as broad as long: the proximal and distal edges are slightly thickened and everted: the 



second brachial is similar, but the distal edge is prominently everted, especially in the middle 



third where it is thickened, and concave distally, and stands up vertically from the dorsal 



surface of the joint face; the third and fourth brachials (forming the first syzygial pair) are 



ther slightly longer on one side than on the other, about twice as broad as the lesser 



length, résembling the IBr series but with the tubercle within the median part of the proximal 



•nly just indicated; the following three brachials are slightly wedge-shaped, about twice 



; as the median length, their distal borders everted as described lor the second brachial, 



I pn ely less and less so; following brachials triangular, about as long as broad, with 



jhtly pi I and overlapping distal . the fourth-ninth bear a low rounded median 



rination, this after the ninth becoming the low rounded zigzag keel characteristic of the arms 



of the genus, which is traceable throughout the length of the arm. Sy/ygies 



brachials 3-1-4, 84-9 and 1 5 + 14 (usually to 15 -f 16, and distally at intervals 



I (usually 3) oblique muscular articulations. 



