sS BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



do not have more than 40 segments. The dorsal spines, especially the opposing 

 spine, are better developed than in the type. There are about 50 arms, and in some 

 oases i be 1 1 1 Pr scries are '2. The ground color is purplish, marked with yellow bands. 

 I have examined two of these specimens. 



The specimen collected by the QazeUe in Mermaid Strait may be described as 

 follows: The centrodorsal is thick discoidal with a rather small flat bare polar area. 

 The cirrus sockets are arranged in three closely crowded alternating marginal rows. 

 The cirri are XXV, 51-60, 40 mm. long. The first segment is very short, four or 

 more times as broad as long, those following increasing very gradually in length to 

 the sixth or seventh, after which they remain uniform, usually slightly broader than 

 long, sometimes about as long as broad, to the seventeenth to twenty-fourth. They 

 then decrease in length, soon becoming about twice as broad as long and so remaining 

 to the end of the cirrus. The penultimate segment is rather longer than those pre- 

 ceding, about as long as broad. Up to a point between the seventeenth and twenty- 

 fourth segments the cirri are without dorsal processes, and the segments have a 

 dull surface ; t here is an indication of a median constriction on each segment. Beyond 

 this point the segments become laterally compressed and develop subterminal dorsal 

 tubercles or small spines which do not, however, become very prominent. The 

 opposing spine is much larger than the dorsal processes preceding. It arises from 

 the entire dorsal surface of the penultimate segment, is about as long as the distal 

 width of that segment, and is directed slightly forward. The terminal claw is about 

 half again as long as the penultimate segment and is rather slender and rather slightly 

 curved. 



The disk and the brachial perisome to the last axillary are completely covered 

 with a pavement of small regular plates. The radials are even with the edge of the 

 centrodorsal. The IBr, are exceedingly short, regularly oblong and bandlike, basally 

 united interiorly. The lBr 2 (axillaries) are very short, three to four times as broad 

 as long, almost triangular, with the lateral edges not quite so long as those of the 

 IBr,, laterally rounded and widely free. The IIBr series are 4(3+4), rounded later- 

 ally, without marginal processes, and widely free; the IIBr, are united interiorly for 

 about the proximal half or rather more, the free distal portion of their interior sides 

 diverging at rather more than a right angle. The IIIBr series are always 4(3+4) 

 exteriorly and usually the same interiorly, though here not infrequently 2, thus 

 suggesting the arrangement characteristic of Himerometra. The IVBr and VBr 

 , when present, are 4(3+4). There are about 85 arms approximately 120 mm. 

 long. The first eight brachials are oblong, slightly over twice as broad as long, those 

 following becoming alightly wedge-shaped, about twice as broad as long, gradually 

 changing to oblong, or vcr\ nearly so, about two and one-half times as broad as long. 



P D is 30 mm. long, very stout basally but tapering distally and becoming very 

 slender and flagellate in the distal third. It is composed of about 50 segments, which 

 at first are about as long as broad, then broader than long, distally again about as 

 broad as long, and terminally longer than broad. After the end of the proximal 

 third the distal ends of the segments on the dorsal side become prominent, soon 

 developing into rather long dorsal processes which disappear at the beginning of the 

 distal third. P,. is similar to P,„ but rather larger. P PP and P, are progressively 

 smaller and shorter, the latter being only about 9 mm. long and very slender, without 



