318 THE VOYAGE OF H.M.S. CHALLENGER. 



overlapping a little. The later joints become more square, and finally somewhat 

 elongated. A syzygy in the second brachial, except after the radial axillary, when it is 

 in the third ; the next from the thirteenth to twenty-sixth, usually about the sixteenth 

 brachial ; others at intervals of three to twelve joints, generally six or seven. 



The second distichal and the first brachial bear tolerably equal pinnules about 10 

 mm. long, the first one being a little stouter at the base. Their lowest joints may be 

 slightly carinate. The next pair are somewhat shorter and the following pair more so. 

 The lowest pinnules have a fairly large terminal comb, which occurs on all the pinnules 

 as far as the tenth brachial and sometimes even to the twentieth or thirtieth. 



Mouth radial ; the disk may have a few calcareous nodules. 



Colour in spirit, — blackish- or reddish-brown. 



Disk 14 mm.; spread 25 cm. 



Localities. — Banda, 17 fathoms. Three specimens. 



Station 208, January 17, 1875; lat. 11° 37' N., long. 123° 31' E.; 18 fathoms; blue 

 mud. One specimen. 



Other Localities. — Sunda Strait (Regnault) ; Australian Seas (Peron and Lesueur) ; 

 Angio, Java ; Nicobar Islands ; Madagascar (?). 



Remarks. — The Lamarckian type of this species is a dry specimen with twenty arms 

 which was brought by Peron and Lesueur from the Australian Seas ; but the name 

 Comatula Jimbriata was also applied by J. S. Miller to the common ten-armed Antedon 

 of Milford Haven, which is usually called Antedon rosacea. Johannes Miiller examined 

 Lamarck's original in the Paris Museum, where he also found three spirit specimens pre- 

 senting the same characters which had been obtained by Regnault in 1S29. Miiller gave 

 Trincomalee as the locality for this form ; ! but when I visited the Paris Museum in 1876 

 I found it labelled as having come from Sunda Strait. It bore the MS. name Comatula 

 brevicirra, Troschel ; while Peron's example, the type of the species, still bore the same 

 designation, Comatula multiradiata, Lamarck, as it did when Miiller examined it in 1844. 

 The later cirrus-joints of this specimen bear several small spines on their dorsal border. But 

 they are much more distinct in some cirri than in others ; while in Regnault's specimen 

 they are of smaller size and appear on fewer joints. In the Challenger individual from 

 the Philippines there is a small spine at the distal edge of the fifth cirrus-joint ; and in the 

 following joints it gradually develops into a crest bearing a variable number of spinelets, 

 which sometimes give rise to a double opposing spine on the penultimate. Two of three 

 forms from Banda have a similar armature on the cirri ; but in the third there is little or 

 no trace of it (PI. LXII. fig. 3). This species appears to be one in which palmare are not 

 developed, so that the number of arms does not exceed twenty, and may be less. The 

 latter condition is unusual, however, distichal axillaries being generally developed all 



1 Abhandl. d. k. Akad. d. Wiss. Berlin, Jahrg. 1847 [1849], p. 258. 



