2 SMITHSONIAN ArJSCi:LLANi:OUS COLLECTIONS \0L. 91 



The radials are visible as curved bands with parallel sides from six 

 to eight times as broad as long just above the centrodorsal. The 

 anterolateral angles of adjacent radials are separated l)y a slight notch, 

 the sides of which make an angle of about 90° with each other. There 

 are no subradial clefts, but the line of junction between the centro- 

 dorsal and the radials is slightly and narrowly incised. 



'Jlie IBri are about three times as broad as their lateral length, 

 with the lateral edges, as viewed dorsally, approximately straight 

 and parallel and separated from those of their neighbors by a narrow 

 interval. The proximal border is straight, but the distal is deeply 

 incised in the median portion by the backward projection of the 

 axillary, which reaches a point between one third and one half the 

 distance from the distal to the proximal edge. The IBv-, (axillaries) 

 are longer than broad, and are more or less rhombic in shape. The 

 proximal sides are rather strongly concave, and the distal sides are 

 broadly S-shaped, curving inward fronx the lateral angles and thence 

 gradually ou.tward, becoming almost parallel on the sides of the un- 

 usually produced anterior angle, which is broadly truncated. 



The first brachials are at least four times as long exteriorly as 

 interiorly. The ]:)roximal border is broadly S-shaped, following the 

 curve of the adjoining l)order of the axillary. The distal border 

 runs inward from the outer anterolateral angle ap])r()ximately at righl 

 angles to the longitudinal axis of the arm to a point s(jmevvhat 

 beyond the midradial line, then curves outward and runs at a very 

 slight angle to the proximal border to the inner anterolateral angle. 



The second brachials are larger than the first, and are irregularly 

 c^uadrate with their lower angle rather deeply incising the first brachial. 



The third brachials (the hy])Ozygals of the first syzygial pair) are 

 low triangular, the inner border being about twice as long as the 

 median length and the outer l)()rder being reduced almost or quite 

 to a point. 



The arms are not pi'eserved beycMid this point. 



The width of the animal at the level of the third brachials is 

 about 6.5 mm. 



A second s])ecimen from the same locality resem])les the first, but 

 is very slightly smaller. 



In a third si)ecimen from the same locality (pi. 2, fig. 4) the cirri 

 are lO.o mm long with 27 segments, of which the first is from twice as 

 broad as long to about as long as broad, the second is about as long as 

 broad or slightly longer than broad, the third is about three times 

 as long as the median width, the fourth is still longer, and the fifth 



