104 
Remarks.—Only four species of Astrotoma have hitherto been de- 
scribed: A. murrayi Lyman, 1882, obtained by the “‘ Challenger” at 
Banda Islands, 200 fathoms; A. agassizii Lyman, 1875, from the 
Straits of Magellan, 135 fathoms: from both of which our species 
differs in various respects. The descriptions of A. bellator Koehler, 
and A. vecors Koehler, got during the “ Siboga” expedition (1904) 
from the Sulu Archipelago and Banda Sea respectively, are not acces- 
sible to me, so it may turn out that ours is synonymous with one of 
them. 
Amphiura nore, sp. nov. 
Plate X, figs. 1-3. 
Station 83. 
The colour of the solitary specimen is, in alcohol, and later when 
dried, pale greenish-grey, with whitish arms: The disc, which is 
9mm. in diameter, is deeply notched interbrachially. The arms are 
more than 45mm. in length (the tips are broken); each is about 
15mm. across the base. The upper surface is covered with small, 
flat, round, overlapping scales; a central and 5 radially situated 
scales, a little distance from the centre, are circular and distinctly 
larger than the rest. The scales decrease in size towards the margin, 
though those immediately bordering the adradial plates are rather 
larger than their neighbours. 
The adradials are narrow, convex externally, slightly concave 
internally, extend about half-way towards the centre of the disc, and 
do not quite reach the margin. They measure 2mm. in breadth by 
5mm. in length. The two adradials of a pair are separated by a row 
of 3 long plates, and their proximal ends by 2 or 3 rounded ones. 
The mouth-shields are somewhat oval, with the slightly longer 
axis radial. The proximal margin is slightly peaked; the distal 
convex, with two very slight notches dividing the margin into three 
nearly equal portions, of which the middle is rather more pro- 
nounced. 
The side mouth-plates are broader distally than orally where they 
touch ; the lateral margin is slightly excavated. 
There are 3 buccal papille on each side of each mouth-angle—one 
at the apex of each jawpiece forming the angle, a second smaller one 
laterally, while the third is very large, oval, and plate-like, nearly as 
long as the side mouth-plate, and resembling a “ tentacle scale.” 
The actinal interbrachial area is almost naked; there is at the 
margin a very narrow band of small scales, continuous with those 
of the upper surface of the disc, another narrow band along the side 
of each genital cleft, and a few small, isolated scales in the intergenital 
area. This naked interbrachial area, and the presence of the middle 
of the three buccal papille, serve to distinguish this species from 
A. rosea Farquhar [13], to which it bears, otherwise, a general re- 
semblance. 
