SEA LTLIES, STARFISHES, ETC. — CLARK. 25 



conical ; cirrus-sockets in ten vertical series of 3 or 4 each 

 (about 35 altogether), the series separated radially by a rather 

 broad area, with finely roughened surface. Cirri 45 to 50 mm. 

 long, with 68-74 segments, of which the fifth or sixth is longest 

 (much longer than thick) and all but the basal fifteen have the 

 distal dorsal margin produced into what looks like a sharp 

 spine, when seen from the side ; distal segments, including 

 this dorsal spine twice as wide as high. 



Radials completely concealed except for the small disto- 

 lateral corner which appears in the interradial angles of the 

 calyx. IBrl crescentic, the proximal margin strongly 

 convex, the distal correspondingly concave ; excepting only 

 the distal median portion, the whole surface is rough and 

 spinulose, especially the lateral margins. IBr2 (axillary), 

 rhomboidal with anterior margins, sHghtly concave ; all 

 margins finely serrulate and lateral surfaces rough and 

 spinulose ; synarthrial tubercle of 1 and 2, smooth and 

 rounded, low but distinct. IIBr series, 2, very similar to 

 the IBr series, but the lateral spinulose surfaces are much 

 less marked, especially on the axiUary and are nearly wanting 

 on the inner side. First two brachials are similar but are 

 relatively much longer and narrower and have no spinulose 

 lateral areas, though the lateral margins are very serrulate 

 and rough. The division series and these two brachials have 

 strongly flattened sides ; the division series are in closely 

 appressed contact, but the lower brachials are much less so, 

 and probably in life hardly touch. Brachials 3-10 quadri- 

 lateral, but subsequent segments become triangular, the 

 distolateral angle being more and more prominent ; beyond 

 the middle of the arm the segments become quadrilateral again 

 and nearly as long as wide ; proximally both proximal and 

 distal margins are everted and rough, but beyond the 12-14 

 joint only the distal margin is conspicuous ; even near the tip 

 of the arm, however, the distal margin is not very flaring and 

 it never overlaps the following segment. Beginning at the 

 35th, or thereabouts, the distal dorsal surface of each segment 

 is rough with minute spines and these soon cover the whole 

 median area of the arm ; near the tip, this area is a very 

 narrow band. 



Pi about 11 mm. long, of 25 smooth segments, the six basal 

 ones much wider than long, somewhat axe-head shaped, much 

 flattened dorsally ; remaining segments longer than wide, or 

 at least as long, the eighth segment being the longest. Pg 

 similar, but only 10 mm. long and with only 22 segments. 

 P3 similar, but a little shorter. P4-P10 more prismatic, only 



