Prof. F. J. Bell on a new Species of Antedon. 427 
Fig. 2. The tip of atrophonema, X 42, showing e, the superficial capillary 
plexus ; the other letters as before. 
Fig. 3. Transverse section of a trophonema in its basal half, x 188; m, 
a, v as before; c, the superficial capillaries of the glandular 
centre, and c’, the superficial capillaries of the non-glandular 
margin, in section; g,a gland in vertical, and g’, one in obliquely 
transyerse section. 
P.S.—Since the above was written I have been fortunate 
enough to obtain two female specimens of Trygon Bleekert ; 
in both the eft oviduct alone is developed. 
LXIII.— Description of a new Species of Antedon from 
Mauritius. By ¥. Jerrrey Be, M.A. 
[Plate XVIIL] 
Tue Trustees of the British Museum have lately acquired 
some specimens of an <Antedon from Mauritius which not 
only appears to be ‘‘ new,” but to present some very inter- 
esting relations to a group of already known species. 
The group which the late Dr. P. H. Carpenter called 
(Chall. Rep. Comat. p. 227) the palmata-group consisted of 
bidistichate species with an unplated disk and a first pinnule 
smaller than its successors. 
Of these some have a pinnule on the third brachial, and of 
those with two or more postradial axillaries some have the 
rays free laterally. Of these, three species—A. tuberculata, 
A. spicata, and A. indica—have the second pinnule stiff and 
styliform, of twelve to eighteen much elongated joints. 
With them the Mauritian species is to be placed, but it is 
to be distinguished from them by the following characters :— 
(1) The marginal projections at the sides of the rays are 
continued on to the most proximal brachial joints. 
(2) The second pinnule, though “ stiff and styliform,” is 
not extraordinarily so, and the joints, though no 
more than twenty, are not abnormally long. 
(83) The disk is as small as in A. indica, and the centro- 
dorsal occupies the whole of its aboral surface. 
