576 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The specimen from the Macclesfield Bank in 91 meters has the cirri XXIII, 

 33-36, 23 mm. long. Dorsal spines are developed from the tenth segment onward. 

 In this specimen the cirrus segments are not so long proportionately as in that preced- 

 ing. One of the cirri is regenerating the distal portion. There are between 25 and 

 30 arms 65 mm. long. Very fine spines are developed in the areas of ornamentation. 

 These little fuzzy spines cover the radials and a small part of the proximal edge of the 

 IBr,, extending thence upward interradially. At the articulations the ornamentation 

 extends somewhat dorsalward, following along the articular divisions, and it may 

 even narrowly bridge the division series at the synarthries, a condition not occurring 

 so markedly in the other specimen. 



In both individuals the division series are sharply flattened laterally, and both 

 have the same median carination of the division series and lower brachials, and the 

 same deep-purple narrow median line. 



The specimen from off Jolo is young, with 12 arms. 



The specimen from the Bay of Amboina has 24 arms 35 mm. long. The four 

 IIIBr series present are all externally developed; one of the postradial series bears 

 two, and two of the others bear one each. The cirri have 27 segments and are 14 mm. 

 long. 



The specimen from the Danish Expedition to the Kei Islands station 24 has about 

 30 arms and resembles that following. 



In the specimen from the Danish Expedition to the Kei Islands station 54 the 

 cirri are XXIII, 29-31, 20 mm. long. The first segment is very short, the second is 

 twice as broad as long, the third is slightly longer than broad, and the fifth-seventh 

 or -eighth are the longest, twice as long as broad. The segments following decrease 

 in length so that the outer are slightly broader than long. The tenth and following 

 segments bear long sharp dorsal spines which are directed obliquely forward. The 

 27 arms are 55 mm. long. Of the seven IIIBr series present, 6 are externally developed 

 and one is internal, by the side of an internal series. The lateral edges of the elements 

 of the division series are rather broadly flattened. The lateral borders of the dorsal 

 surface of the elements of the division series are thickly beset with short papillae or 

 short spines. Along the articulations between the axillaries and the ossicles preceding 

 this ornamentation runs inward half way to the median line in the form of a broad 

 triangle. The distal border of the radials is finely beaded, and the dorsal surface 

 carries a few well spaced low tubercles. The ossicles of the division series and the 

 brachials have a prominent but low and narrow rounded median keel that becomes 

 less conspicuous after the proximal third of the arms but is traceable to the arm tips. 



P! is 5 mm. long, with 18 segments. The first four segments are broad, but 

 beyond the fifth the pinnule is slender and flagellate. The first segment is slightly 

 broader than long, the second is also slightly broader than long, and the third is 

 about as long as broad. The fourth tapers distally and is longer than the width of 

 the proximal end. The fifth and following segments are twice as long as broad or 

 somewhat longer. The second-fourth segments have a narrow knifelike keel that 

 disappears at the distal end of the latter. P 2 is 7 mm. long, with 20 segments. It is 

 stiffer than P 1? tapers more gradually, and is composed of proportionately longer 

 segments. The second-fourth segments are narrowly but conspicuously carinate. PS 

 is 10 mm. long, with 18 segments, and is stouter than P 2 . The first segment is about 



