cirri usually more than XL: interradial perisomic pli 



usually inconspicuous or undeveloped I aroë and Shetland Is 



lands, Norway, western Sweden and Denmark, and northern 



S otland, extending southward in deep water to the 



uthern coasts o( England and Ireland; absent from 



the Norl 5 />< tasus 



small; arms less than 60 mm. in length; cirri less than XXXV' 

 centrodorsal ver) low, evenly convex, with very sloping sides; dorsal 

 pole very small. from one third to one half of the diameter of the 

 •entrodorsal : arms 30 mm. te. 4.1 mm. long (St. Thomas, Danish 

 West In. lies, southward to Rio de | a n e i r o . Brazil) . dübenii 

 centrodorsal thin discoidal, the large flat dorsal pole being in width 

 more than two thirds of the basal diameter of the centrodorsal; 

 arms usually about 60 mm. long (from Corsica and Sicily 

 westward along the northern coast of Africa to Tan- 

 gier, and southward to Senegal, in cl 11 ding the Azores, 

 Madeira, and the Canary Islands) moroccana 



Compsometra A. H. (.huk. 



Ke\ to the Species of the Genus Compsometra. 



a 1 Cirri about one third of the arm length, exceedingly slendcr and delicate, almost 

 hair-like, ver) slightly rec.urved, the earlier segments with greatly swollen arti- 

 culations, those in the distal fourth gradually decreasing in diameier so that the 

 cirrus ends in a sharp point; no opposing spine; arms 20 mm. to 40 mm. long; 

 cirri X — X \ II. 12 — 16, 7 mm. to 11 mm. long; 1', 3.5 mm. to 4 mm. long 



with o -11 segments; 1'., i.- 



mm. 



long to 1.7 mm. 



lOIli"' 



with 7 segments 



1 lores to the Moluccas; o — 95 Metres) longicirra 



1 irri short, not over one fifth of the arm length and usually less, stouter, in 

 lateral view increasing in diameter in the distal half, with the outer segments 

 much shorter than the elongate earlier segments, nevcr more than twice as long 



broad and usually much shorter; au opposing spine is alwavs present 

 IV cirri short, about one ninth of the arm length, composed of short segments 

 oi uhich the longest proximal (the fourth and fifth) are about half again as 

 long as the median diameter and the last three preceding the penultimate 

 are about as long as broad, or even broader than long; in the outer half 

 the cirri are strongly recurved and the segments are strongly constricted 

 laterally so that in lateral view this part of the cirri appears about twice as 

 broad as the proximal; centrodorsal discoidal with a very broad hare dorsal 

 [.■■Ie nearly or quite 2 mm. in diameter; cirri X XXIV XX XVI, 9 — 12, 

 ually 10. 7 mm. long; arms 6omm. to 65 mm. long (from Port Jackson, 



