AMPHIURA. 121 
‘Disk greyish; arms bright orange. 
‘“‘ A single specimen of this most interesting addition to our fauna 
was dredged in 1861, by Mr. Jeffreys and myself, on the haddock- 
ground about six miles to the north of the Walsey Lighthouse, 
Shetland, in 40-50 fathoms. The species had, previously to the 
date just mentioned, been inserted as British in the ‘ List of British 
Marine Invertebrate Fauna’ published by the British Association ; 
but, as far as we can learn, at that time it had not been taken in our 
seas; and it would seem that the name was inserted by mistake for 
A, chiajic. 
“The arms of these species ure more flexible than those of any 
other Echinoderm with which we are acquainted. 
“They are commonly coiled upon themselyes in many complete 
circles.” 
Allied to A. sguamata, but with more slender and longer arm- 
spines, coarser disk-scales, and longer arm-plates. Perhaps only a 
variety. 
Distribution. Both sides of North Atlantic. 
5. Amphiura borealis. 
Ophiopeltis borealis, G. O. Sars, Forh. Vid. Selsk. Christ. 1871 
(1872), p. 16. 
Amphiura borealis, Zyman, Chall. Rep. Oph. (1882) p. 144; Hoyle, 
Proc. Roy. Phys. Soc. Ed. viii. (1885) p. 159. 
A small species, with arms more than twelve times the radius of 
the disk; scaling of disk distinct on dorsal surface only; radial 
shields divergent internally; three or four short arm-spines, one of 
which is considerably thickened at its free end. No tentacle-scales. 
Two mouth-papille, one at the side and one at the angle. 
Faeroe Channel; 203 fms. (fide Hoyle). 
Distribution. Lofoten, coast of Norway. 80-400 fms. 
6. Amphiura bellis, var. tritonis. 
Amphiura bellis, Zyman, Chall. Rep. Oph. (1882) p. 127. 
Amphiura bellis, var. tritonis, Hoyle, Proc. Roy. Soc. Ed. xii. p. 716 
(pl. vii. figs. 1-3). 
Mr. Hoyle gives the following account of the single specimen of 
this variety known :— 
“ Diameter of disk, 12 mm. Arms long and slender, 11 cm. 
Width of arm close to disk, without spines, 2mm. ‘Two mouth- 
papille on either side; one large, trapezoidal, at the apex of the 
mouth-angle, one of its sides coinciding with the corresponding 
margin of its fellow, the ten papille almost enclosing the circle 
of the mouth; the other mouth-papilla is at the commencement 
of the oral process, is acutely pointed and triangular, and is 
succeeded immediately by a diamond-shaped scale, which covers the 
opening of the first tentacle. A supplementary scale was noticed at 
one mouth-angle. 
