REPORT ON THE ASTEROIDEA. 643 
possessed by only two other forms, Freyella tuberculata and Freyella sexradiata. It 
may be distinguished from both of these by the spinulation of the abactinal plates, each 
plate bearing two or three small spinelets covered with simple membrane devoid of pedi- 
cellariz. The general proportions are also different. 
10. Freyella heroina, n. sp. (Pl. CXIV. figs. 5-8). 
Rays nines R=320mm.; r=10mm. R=32r. Breadth of a ray at the base, 55 
mm.; at the widest part of the ovarial inflation, 8°5 mm. ; and at 40 mm. beyond the disk, 
4°5 mm. 
Rays delicate and of remarkable length, cylindrical and narrow at the base, but almost 
immediately swelling rather abruptly into a short ovoid ovarial inflation of moderate 
tumidity, which hardly extends beyond 15 mm. from the base of the proximal twenty- 
first part of the ray. From thence the ray is subtriangular and tapers continuously to the 
extremity. The rays are distinctly spaced at the base, the interbrachial arcs being 
sharply rounded. 
The disk is small, with the abactinal surface, which is subplane and capable of slight 
inflation, very little higher than the base of the rays. The membrane covering the 
disk and the basal portion of the rays, to the limit of the ovarial region, is underlaid by a 
pavement of calcareous plates of subhexagonal form, which appear rather widely spaced. 
The plating of the disk is invisible superficially, but that of the ovarial region may be 
clearly traced with a hand-magnifier. On the disk the plates bear only very small spinelets, 
about a millimetre in length or rather less, which taper slightly and are covered with simple 
membrane, and they are sufliciently numerous to give a fairly hirsute appearance to the 
disk. On the ovarial regions the spinelets are smaller and are congregated in little groups 
of three to five on the centre of each plate, and the groups have consequently a distinct 
and isolated appearance when seen with a low power. No pedicellarize occur normally 
among the spinelets on the disk and ovarial regions, but here and there a small sporadic 
one may be found. On the outer (distal) portion of the ovarial swelling, however, the 
spinelets diminish in number, and their place is taken by small crowded pedicellariz, which 
speedily fall into crowded transverse bands, the spinelets disappearing altogether. These 
pedicellarize are very small and measure from 0°12 to 0°15 mm. in length. Beyond the 
ovarial inflation the abactinal surface of the ray is covered with the usual delicate trans- 
parent membrane, bearing saddle-like sacecular bands crowded with minute pedicellariz, 
the corresponding bands on the two sides of the ray being united across the median keel. 
The ambulacral furrow occupies nearly the whole of the actinal surface of the ray, 
measuring about 2 mm. in width at a part where the whole ray is 4 mm. The adam- 
bulacral plates are elongate, nearly 2 mm. in length, and form a narrow rounded margin 
to the furrow; their form is strikingly suggestive of a caudal vertebra; the adoral end of 
