ANNOTATED LIST. 17 
joint and syzygy black; pinnule segments almost white; cirri pale yellowish. (6) Disk 
very dark, variegated or speckled with green; basal third of arms brown, all syzygies and 
joints dark brown; distal two-thirds of arms bright yellow-green with joints, syzygies, and 
oral surface dark brown; cirri dull light-blue. (7) Dull black; oral side of terminal half 
of arms white. (8) Dead-black; only the bases of the oral pinnules white. 
The diversity of size, arm-number, and number of cirri is no less noteworthy. In size 
the range was from less than 50 mm. diameter up to approximately 300 mm. The number 
of arms ranged from 13 to 47, but the great majority of individuals had between 32 and 43; 
only 11 were noted with more than 43 arms. The division series are very generally 4 (3 +4) 
and it is not difficult to find individuals with 38 to 40 arms in which every series is thus. 
On the other hand, most individuals have one or more series simply 2, and in one specimen 
no fewer than 18 series are of this number. Brachials of the third (iii Br) series are of course 
present in specimens with more than 20 arms, and brachials of the fourth series (iv Br) 
are very generally present; in two specimens, one with 40 and one with 42 arms, a v Br 
series is present. The number of cirri ranges from none, a very common condition, to as 
many as 18 or 19, but as a rule they are few and weak. 
The range of annulata is from Ceylon eastward to Fiji and Tonga, and southward to 
Port Denison, Queensland, and to the northwest coast of Australia. 
Comanthus annulata var. xantha. 
H. L. Clark. 1915. Carnegie Inst. Wash. Pub. No. 212, p. 102. 
(Plate 1, Figure 6.) 
A superb comatulid, bright red and yellow in color, was found in the cavity of a large 
sponge, brought up by the Japanese diver from 18 fathoms off the northwestern reef at 
Mer, October 13, 1913. The following day two similar specimens were found near the edge 
of the southwestern reef. Except for the color, I fail to detect any characters by which 
this form can be distinguished from annulata and I therefore suppose it is only a color 
variety. But it is so well marked and easily recognized that it seems to me worth while 
to give it a name. 
Comanthus callipepla. 
H. L. Clark. 1915. Carnegie Inst. Pub. No. 212, p. 102. 
(Plate 1, Figure 1.) 
In his Siboga report, Mr. A. H. Clark (1918, p. 43, 44) assigns this species to the syn- 
onymy of C. briareus, in spite of my definite assertion to the contrary. Of course, in view 
of this action I have again been over the evidence and I am confident that Mr. Clark is 
wrong. The Museum of Comparative Zoélogy has a fine series of 28 specimens of briareus 
from the Philippines, most of which are accompanied by Dr. Griffin’s valuable notes on 
their color in life. Some of these are rather small and on one several cirri are present. The 
presence of cirri in callipepla is not in itself, therefore, a character to distinguish the species 
invariably from briareus; indeed, it is quite possible that the Murray Island species may 
lack cirri when old and particularly when senescent. But comparison of a cirrus of briareus 
with one of callipepla brings out another distinguishing character not emphasized in my 
original description. In briareus the cirri, when present, are composed of about 11 segments 
and end in a conspicuous curved claw, while in callipepla there are 16 segments and the 
terminal claw is minute and scarcely at all curved. The form of the individual segments 
in the two species is also seen to be markedly different when the cirri are placed side by 
side. The difference between briareus and callipepla in the form of the I Br and II Br 
series is very striking, and by itself is ample to separate them. As for the difference in 
color, briareus is commonly brown of some shade or very deep reddish; it is often sprinkled, 
