WI OPHIUROIDEA. 
long. Under arm-plates quite small, wider than long, with a well- 
marked curve to the outer edge. <A single tentacle-scale on joints 
beyond the disk. Lateral arm-plates meet below, bear about five 
spines, which are not as long as the plates except near the disk. 
Upper arm-plates oblong near disk, where they are wider than long, 
then quadrate, and then longer than square. 
lve) 3 pS 
? 
Colour in spirit white; alive reddish yellow, occasionally pale 
sandy (Hodge). 
Of this species Hodge remarks that it exhibits excessively lively 
movements and has wonderfully pliable rays. 
Distribution. Kast and west coasts of North Atlantic, and Medi- 
terranean. 10-192 fms. 
7. Ophiura aurantiaca. 
Ophioglypha aurantiaca, Verrill, Amer. Journ. Sci. xxiii. (1882) 
p- 141; Lyman, Proc. R. Soc. Edinb. xi. (1882) p. 707 ; ad. Bull. 
Mus. C. Z. x. (1883) p. 240; Hoyle, Proc. R. Soc. Edinb. xii. 
(1884) p. 717. 
Ophiopleura aurantiaca, Verrill, op. cit. p. 248. 
Of this species, which I have not seen, some specimens with 
broken arms were dredged in the warm area of the Faeroe Channel 
at 516-570 fms. 
Mr. Lyman gives as its “‘ special marks ”’ :— 
“Disk covered by a smooth skin, through which the scales of the 
upper surface are scarcely to be made out, while those of the lower 
surface are more distinct. Three wide flattened arm-spines, the 
upper one longer than an arm-joint, the others not so long. No 
comb above the base of the arm.” 
Distribution. Both sides of the North Atlantic, 466-570 fms. 
Prof. Verrill’s full description is as follows :— 
*‘ Disk large, swollen, nearly round, with small notches, destitute 
of papillee, at the bases of the five arms; dorsal surface covered by 
very numerous small, imbricated scales, partially concealed by a 
soft skin ; in the central area they are crowdedly arranged around 
one or more larger central plates; the marginal interradial scales 
are larger and thicker, with a median radial row of two or three 
still larger ones ; ventral scales convex, unequal, imbricated. Radial 
shields convex, irregularly subtriangular, with rounded corners and 
outer edge, as broad as long, separated by a group of three or more 
imbricated disk-scales. Mouth-shields shorter than broad, with an 
obtuse inner angle, a nearly straight outer edge, and short, notched, 
lateral edges. Side mouth-shields long and rather broad oblong, 
meeting within. Mouth-papille very small and irregular, 7 to 9 
on each side of each angle, those next to the teeth longer and 
pointed. ‘Teeth slender, acute. Innermost tentacle-pores large, 
bordered on the outside by about six small flat scales, on the inner 
by about four. Arms somewhat rigid, rather short and stout, not 
