346 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



fourteenth brachial, thence slowly tapering distally. The centrodorsal is 3.5 mm. in 

 diameter, thin discoidal, with a gently concave dorsal surface. The cirri are XX, 

 13-14, from 12 to 15 mm. long. A large stout specimen resembles the preceding. 

 The centrodorsal is thin discoidal, slightly concave dorsally, 2.5 mm. in diameter. 

 The cirri are XVI, 14, from 13 to 15 mm. long. Another specimen has the arms 130 

 mm. long, rather strongly broadened at the base. The cirri are XVI, 12-13 (usually 

 13), from 10 to 13 mm. long. Another individual has 13 arms, which are more slender 

 than those in the preceding specimens. There is a single IIBr 2 (1 + 2) series on each 

 of 3 postradial series. On the arms arising from IIBr series the first 4 brachials are 

 united into 2 syzygial pairs. The centrodorsal is thin discoidal, flat, 5 mm. in diam- 

 eter. The cirri are XVI, 14-15, 15 mm. long. The last specimen resembles the one 

 just preceding, but has only 10 arms. The centrodorsal is thin discoidal, flat, 4 mm. 

 in diameter. The cirri are XVI, 14-16, from 13 to 15 mm. long. 



The specimen from the Kei Islands expedition station 101 has 15 arms up to 

 180 mm. in length. The arms are moderately stout. The centrodorsal is thin dis- 

 coidal, with a flat circular dorsal pole 4 mm. in diameter. The cirri are XVIII, 15-16 

 (usually 16), and are arranged in a single marginal row. There are 4 IIBr 2 (1 + 2) 

 series and a single IIIBr 2 (1 + 2) series, the last externally developed. Following this 

 the inner arm has the first 4 brachials united into 2 syzygial pairs, while the first 

 syzygy on the outer arm is between brachials 2 + 3. The second segment of P 2 and P 3 

 is very strongly carinate on some arms, but much less strongly carinate on others. 



In the type of Comatula (Actinometra!) hamata from Cape Bantam as described 

 by Kuhl and van Hasselt the centrodorsal is small, smooth, not concave, 4 mm. in 

 diameter, bearing marginal cirri. 



The cirri are XX, 13-14, slightly compressed laterally. The opposing spine is 

 conical and toothlike and the terminal claw is elongated and hooklike. 



The 10 arms are 120 mm. in length and from 3 to 3.5 mm. in width. They are 

 rounded dorsally and carry 60 or 61 pairs of pinnules. The brachials are triangular 

 or wedge-shaped, but show no trace of a keel. The pinnules are borne on the longer 

 side. 



The pinnules seem to be longest toward the middle of the arms. From the base 

 they increase in length, and then diminish very regularly. Of the pinnule segments, 

 which number from 20 to 22, the 5 or 6 basal are the broadest and longest, the outer 

 being less broad and square in form; the terminal segments are armed with a lateral 

 process (by which is apparently meant a tooth of the terminal comb). The longest 

 pinnules are from 12 to 14 mm. in length. 



The coloration dorsally is, as shown in the figure, a very light violet gray; each 

 arm bears 2 narrow lines of very dark reddish brown or purple, one on either side 

 of the median line, and numerous narrow well-spaced cross bands of the same color. 

 The pinnules and the cirri, the latter shown as brownish, seem to have lines of a similar 

 color. The centrodorsal is brilliant carmine red. 



Kuhl and van Hasselt add that this individual lived for 6 hours half submerged 

 in water, to which it imparted, while still alive, a red color. 



The specimen from Java (Actinometra affinis Ltitken, MS.) has 12 arms (not 11, 

 as stated by Carpenter) which are about 65 mm. long. In its actual size it is but 



