50 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The cirri are XXV, 40-55, from 25 to 40 mm. long. They are basally slender and 

 rounded, becoming much compressed laterally and broad distally. The first four or 

 five segments are about twice as broad as long, the next is about as long as broad, and 

 the following, a transition segment, is about twice as long as its proximal width, 

 decreasing in width distally, with the surface dull and dark like that of the segments 

 preceding in the proximal two-thirds, and light and highly polished in the distal third. 

 The cirri decrease in width at this point. The segments following the transition 

 segment are about as long as broad, the first being usually longer than broad, gradually 

 becoming shorter, and very short distally. At about the fourth segment beyond the 

 transition segment the distal dorsal edge begins to project, soon becoming a deep 

 dorsal spine which arises from the whole of the middorsal line. The dorsal spines on 

 the terminal segments decrease in height. The opposing spine is short and blunt, 

 terminally situated, not reaching half the width of the penultimate segment in height. 

 The terminal claw is stout and moderately curved, rather longer than the penultimate 

 segment. 



The ends of the basal rays are visible as prominent, though small, tubercles in the 

 interradial angles of the calyx. 



The radials have a strongly curved distal edge, not visible in the median line but 

 extending far up in the interradial angles and surrounding the ends of the basal rays; 

 they reach as far distally as the lateral angles of the IBr axillaries. The IBri are 

 laterally concealed by the interradial anterior extension of the radials and are visible 

 as a triangle with the apex downward in the median line; their edges are everted and 

 roughened. The IBr 2 (axillaries) are over twice as broad as long, rhombic, rising to 

 a low synarthrial tubercle with the IBri, the edges all around everted and roughened, 

 the dorsal surface, like that of the IBn, perfectly smooth. The IIBr series are 2. The 

 IBr series, IIBr series, and first two brachials are in close apposition and sharply 

 flattened laterally. 



The 20 arms are 125 mm. long. The first brachials are wedge-shaped, with the 

 longer side exterior. The second brachials are similar, but nearly twice as large. The 

 brachials following to about the tenth are oblong, about twice as broad as long, those 

 succeeding soon becoming triangular, broader than long, then as long as broad, and 

 distally wedge-shaped again and more or less elongate. The oblong brachials in the 

 proximal portion of the arms have both the anterior and posterior edges everted and 

 roughened. This soon changes to an eversion of the distal ends which are finely 

 spinous, and then to a strong overlapping of the distal ends. The brachials in the 

 proximal third of the arms have the dorsal surface perfectly smooth. In the outer 

 two-thirds the dorsal surface is thickly set with longitudinal lines of fine spines directed 

 forward, giving the outer part of the arms a peculiar velvety appearance. In the 

 proximal third the arms are remarkably deep and compressed; in the outer two-thirds 

 they are dorsally somewhat sharply rounded. 



PI is 8 mm. long with 20 segments, of which the first three are not so long as broad 

 with the corners cut away and those following are about as long as broad, gradually 

 becoming elongate, and distally about twice as long as broad. This pinnule is con- 

 siderably longer and stouter than those following. It is stout basally, tapering grad- 

 ually to a slender and delicate tip. On the outer side of the postradial series it is 

 sharply flattened exteriorly. 



