532 PROF. F. J. BELL ON THE COMATULID. [June 6, 
1 A/RP < is the formula for a multiradiate! Actinometra with its 
radial and palmar (though not its distichal) axillaries syzygies, 
with a syzygy on its first brachial, with less than 13 cirri, and more 
than 40 cirrus-joints. 
When a character frequently though not always obtains, the 
corresponding letter is put within brackets: thus 3AR(P) = would 
be the formula of a species of Antedon in which, though the radial 
and third brachial joints were always syzygial, the palmar axillary 
was only sometimes so; in those rare cases in which divisions 
extend beyond the palmars, I have made use of the symbols P! and 
* salle 
In the lists that follow, the greater number of described species of 
Antedon and Actinometra will be found enumerated and their 
formulze given ; in addition there are given the names and formule 
of some new forms that have been lately collected by Dr. Coppinger, 
of H.M.S. ‘Alert,’ the descriptions of which will be shortly published 
elsewhere. 
As in the paper on Asterias, I have given only one reference to 
the description of each species. In addition to the heavy debt which 
I owe to the published writings of Mr. P. Herbert Carpenter, I 
have to add that the formule of some of the species of Johannes 
Miller are given with more satisfactory knowledge than the rest, 
owing to the fact that Mr. Carpenter, in a manner of which I know 
not whether the scientific liberality or the amiable friendliness is the 
more remarkable, has provided me with copies of the notes made 
by lim on the specimens which formed the bases of Miiller’s de- 
scriptions. Mr. Herbert Carpenter’s two papers referred to in the 
following lists are to be found (i.) in the ‘Notes from the Leyden 
Museum,’ vol. iii., and (ii.) in the ‘Bulletin of the Museum of 
Compar. Zoology,’ ix. no. 4. The references to Johannes Miiller’s 
‘Ueber die Gattung Comatula’ refer to the pagination of the 
separate copies ; Count Pourtales’s papers are to be found in, respec- 
tively, (i.) Bull. M. C.Z. no. 6, (ii.) B. M. C. Z. no. 11, and (iii.) B. 
M. C. Z. v. no. 9. The other references will explain themselves. 
I. Lists or DescriBepD SPECIEs. 
(a) ANTEDON. 
adeone, Mill. p. 15. 
alata, Pourt. ill. p. 215. 
armata, Pourt. il. p. 356. 
articulata, Mill. p. 27. 
. bimaculata, Carp. i. p. 186. 
brevieuneata, Carp. i. p. 187. 
Soe go to 
1 When D or P appear in a formula it is clear the species must haye more 
than 10 rays, because of the meaning of the words those letters represent ; 
where, however, neither distichals nor palmars present asyzygial joint, it will be 
necessary to make use of the mathematical sign for the square root to mark the 
fact of its being a multiradiate species. 
