536 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



of the segments that bear them. The pinnules on the succeedmg division series are 

 similar, but decrease rapidly in length and stoutness. Pi is 20 mm. long (15 mm. 

 in a small specimen), moderately stout basally but rapidly tapering and very slender 

 for most of its length, with about 45 segments. P2 is 10 mm. long, slender basally, 

 much more hke P3 than hke Pj. P3 is only 7 mm. long, small and weak, with 

 about 25 segments and bearing a comb distally. P4 resembles P3 and, like it, bears 

 a usually more or less defective terminal comb. The following pinnules are com- 

 posed of about 20 segments; they are very slightly stouter, and very slowly increase 

 in length; their component segments are at first short, but become longer than 

 broad distally, and have more or less prominent distal ends, so that the pinnule as 

 a whole has a serrate dorsal profile. The last 3 or 4 segments are armed dorsally 

 with 3 or 4 long recurved spines. The distal pinnules are slender, about 13 mm. 

 long, with the first 2 segments short and those following slowly increasing in length 

 and becoming about twice as long as broad distally. All of the segments have 

 produced and overlapping distal ends. 



The color in alcohol varies from light to very dark brown, with the centrodorsal 

 and the cirri lighter; some specimens are reddish brown or olive green. 



Notes. — Of the 3 specimens from Table Island, 1 has 78 arms 160 mm. long, and 

 the cirri XX, 32-35, from 40 to 50 mm. long. The centrodorsal is large and hemi- 

 spherical, 11 mm. in diameter, the bare dorsal pole being 5 mm. in diameter and 

 strongly concave. The disk is 40 mm. in diameter and bears calcareous nodules about 

 the anal tube. The anal area is very large, and the anal tube is central. The mouth 

 is marginal and radial. 



Another specimen has 76 arms 140 mm. long, and the cirri XXX, 29-31, 40 mm. 

 long. The disk is 30 mm. in diameter. The anal tube is covered with calcareous 

 concretions. The mouth is interradial. 



The third specimen has 78 arms 120 mm. long, and the cirri XXVII, 27-33, 

 from 33 to 40 mm. in length. It is similar to the 2 preceding. 



In all 3 specimens all of the division series are 4 (3 + 4). 



In the specimen from Singapore in the Hamburg Museum, according to Car- 

 penter, the centrodorsal reaches 12 mm. in diameter. The cirri are much longer and 

 stouter than in Miiller's tj^pe. Some of them reach 35 mm. in length and are com- 

 posed of 35 segments. The basal segments are very broad, and there are few if any 

 segments that are at all longer than broad. 



The calyx and division series are of the same nature as in the type. All of the 

 division series are 4 (3 + 4). The surface of the brachials is smooth and even. The 

 fourth and following brachials are almost devoid of the articular tubercles which are 

 visible in the corresponding brachials of the type specimen, though in some arms 

 they are slightly developed. The remaining brachials are essentially similar to 

 those of the type, except that they are somewhat wider in proportion to their length, 

 while the second syzygy is rather farther from the base, though Carpenter did not 

 find it as far out as the thirty-eighth brachial, as in the case of the specimen from the 

 Loyalty Islands described by Bolsche. 



This specimen is remarkable for the great length of the lower pinnules, which 

 may reach 40 mm., although they are relatively slender, none of the segments except 



