648 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



IIIBr series is so very close as almost to be obliterated. The brachials are as in the 

 preceding specimen. In both the color in alcohol is uniform dark brown. 



I have not seen these specimens. From Hartlaub's description I suspect that 

 the first may be a species of Comaster, and the second, or perhaps both, may repre- 

 sent Comanthus samoana. I am leaving them here, however, in deference to the 

 expressed opinion of both Carpenter and Hartlaub. 



The specimen from Ponap^, as described by Hartlaub, has 34 arms; of the 10 

 IIBr series, 5 are 4 (3 + 4) and 5 are 2. 



This species is represented from Bock's station 49 by detached arms from 100 

 to 140 mm. in length which Gisl^n determmed as Comanthus parvicirra a coinasteri- 

 pinna. The proximal portion of these arms is 2.2 mm. broad. There are 16 bra- 

 chials to each 10 mm., or 13 if the syzygial pairs are counted as units. Combs with 

 8-10 teeth occur at least as far as the eighth or tenth pinnule. 



One of the specimens from Bock's station 40 was assigned by Gisl^n to 

 Comanthus parvicirra a comasteripinna. The centrodorsal is 3 mm. in diameter, 

 and is raised only slightly above the dorsal surface of the radial pentagon. The cirri 

 are arranged in a single incomplete row. 



The cirri are IX, 13-15, from 4 to 7 mm. long. The first segment is short, the 

 second and third are about as long as broad, and the sixth is the longest, half again 

 as long as broad. From the seventh segment onward a weak dorsal prominence is 

 developed. The opposing spine is equal to one-fifth the width of the penultimate 

 segment in height. The terminal claw is curved and is half again as long as the 

 penultimate segment. 



The radials are six times as broad as long. The IBri are four times as broad as 

 long and are laterally united. The IBr2 (axillaries) are three times as broad as long, 

 low pentagonal, and free laterally. Of the IIBr series, 9 are 4 (3 + 4) and 1 is 2. 

 The 4 IIIBr series are all 4 (3 + 4). The first segments following the axillaries are 

 united internally. The division series are smooth. 



The 24 arms are 90 mm. long. The proximal brachials are somewhat "chubby," 

 then slightly overlapping with small spines distally. The width of the arms proxi- 

 mally is 1.8 mm. There are 14 or 15 brachials to each 10 mm. of arm length, or 11 

 if the syzygial pairs are counted as units. 



Syzygies occur between brachials 3 + 4 (sometimes 4 + 5 or still later) and 

 11 + 12, and distally at intervals of 4 muscular articulations. 



Pd is 12 mm. long with about 45 segments, of which 9 or 10 are involved in the 

 formation of the comb. Pi is 10 mm. long, with a comb consisting of 8-11 teeth. 

 P2 is from 5 to 7 mm. in length with 20-25 segments, of which 8 or 9 bear teeth. 

 P3 is 4 or 5 mm. long with 15 segments, of which 8 or 9 bear teeth. P2 or P3 are the 

 shortest. There are combs on about every other pinnule as far as the twenty-fifth 

 or thirtieth — as an example, on the fourth, fifth, seventh, ninth, eleventh, thirteenth, 

 fifteenth, seventeenth, etc. The distal combs have about 10 teeth. The distal 

 pinnules are 10 mm. long with 22-28 segments. 



The disk is 15 mm. in diameter, without granules. The anal tube is central 

 and is 3 mm. high. The color as preserved is dark sepia. 



