Ophiura. RADIATA. ASTERIAD.E. 489 
32. O. Rosida. — Body, dorsally, spinous, with two large, 
smooth scales at the base of each arm. 
St. scol., Kosula scol. Linck^ p. 52, t, xxvi. No. 42. Borl. Corn. t. xxv. 
f. 19-24. Ast. sphserulata, pentaphylla, varia, aculeata, hastata, fissa, 
et nigra, Penn. Br. Zool. iv. p. 63. No. 63-69, t. xxxii. 63.— A. fra- 
gilis, Muller., Zool. Dan. t. xcviii. f. 1-4. Radiated Star, Cordiner., 
Ruins, No. 16. A. aculeata, Stewart's El. 1. p. 401, No. 9.— Common 
on all parts of the coast. 
The body between the arms is usually prominent, and covered with mi- 
nute warts. The scales of the arms, dorsally, are imbricated, with a ridge in 
the middle, and a slight projection on the distal ridge. Those placed orally 
are similar to the scales of the preceding species. The spines have four or 
five in the row, are longer than the diameter of the ray, minutely denticu- 
lated, and above the base of each denticule on the spine, there is a pore, ac- 
cording to Cordiner — This species has been confounded with the preceding by 
Linnaeus, in the Syst. Nat. p. 1101, No. 12, under the title aculeata. Abild- 
gaard, in the Zoologia Danica, by terming itfragilis., has increased the con- 
fusion. M. Lamarck (An. sans Vert. 1 1. 544.) has still farther added to the dif- 
ficulties by quoting Linck’s figure of rosula., first as synonymous with the gra~ 
nulata., which, however, as usual, he alters and terms ecUnata ; then, as a species 
something different from aculeata of Muller, of which he seems in doubt, yet 
changes into squamata ; and, lastly, as a species which he had not seen, un- 
der the title of rosularia ; while the fragilis of Muller ranks as a species dif- 
ferent from them all ! Among the EcMnodormata., indeed, this author is sin- 
gularly bewildered. In such a state of confusion, I have preferred the specific 
names of Linck. 
Gen. XI. — ASTROPHYTON. — Dorsal disc exposed, cori- 
aceous, and destitute of jointed filaments ; the five arms 
dicliotomously subdivided, with simple spines. At the 
base of each side of the rays, on the oral disc, there is a 
semilunar opening. Cordiner states, probably on good au- 
thority, that the species adhere by the dorsal disc, and that it 
is difficult to disengage them. The preference is here given 
to the old term of Linch^ instead of Euriale of Lamarck. 
33. A. scutatum. — -Body with ten warty ridges. 
Linck., p. 65. tab. xxix. No. 48. and tab. xxx. No. 49. — Asterias caput- 
medusse, Linn. Syst. 1101, No. 16. — Asterias arborescens, Penn. Brit. 
Zool. iv. 67‘ No. 73. Cordiner' s Ruins, No. 19 — A. Caput-medusse, 
Turt. Brit. Faun. 149, No. 131. Stewart's El. i. p. 402 — -Cornwall, Dr 
Borlase. — Orkney, Mr Low, — Zetland, (where it is called Argus), Prof. 
Jameson. 
The arms are rounded and warty dorsally, flat orally, with a single row on 
each side of short pectinated spines, corresponding with the tentacula. Be- 
tween each ray, on the oral disc of the body, there is a depressed coriaceous 
space, and on each ray are two rows of tentacula. Mouth pentagonal, with a 
knob opposite the space of each ray. We have not had an opportunity of ex- 
amining a British example of this species ; but, upon comparing one from the 
Pacific Ocean, with the figure and description which Cordiner has given of 
one from Norway, no marked differences appear to exist. In another, how- 
ever, brought from the coast of Greenland, and presented to me by that ac- 
