572 THE VOYAGE OF H.M.S. CHALLENGER. 
lateral wall of the ray, and is occupied by groups of large papulze, six or more in each, and 
an occasional large forficiform pedicellaria. The infero-marginal plates, which stand at 
the angular junction of the actinal and lateral surfaces of the ray, bear normally an 
obliquely placed pair of equal, robust, truncate spinelets, slightly compressed at the tip, 
which have a group of large pedicellarize on their outer side similar to those above de- 
scribed. Between these and the adambulacral plates is a series of isolated spinelets of the 
same size as the oblique pair, but not compressed, and so placed that each appears to form 
a trio with the pair. They bear on their outer side several large pedicellariz, and are 
separated by papulee. 
The armature of the adambulacral plates consists of two equal, short, obtusely tipped, 
cylindrical, skin-covered spinelets, which radiate apart and form two reoular longitudinal 
series. Within the furrow is a series of rather large forficiform pedicellarize on membran- 
ous pedicles, but they are entirely hidden from view when the inner series of spinelets 
on the adambulacral plates are directed towards, or partly over, the furrow. 
The median interradial line, and a space extending on each side, is devoid of spinelets 
or papulze, and is occupied only by a few isolated forficiform pedicellarize which, by their 
form, simulate conical, sharply pointed spinelets. 
The madreporiform body, which is rather near the margin, is difficult to find, being 
often almost hidden by the vesiculated tufts of pedicellarize which surround the spinelets 
borne on the adjacent abactinal plates; there is, however, no special circlet of spinelets 
round the madreporite. 
The ambulacral tube-feet are crowded and quadriserial in arrangement. 
Colour in alcohol, a bleached brownish or yellowish white. 
Localities.—Station 313. Near the Atlantic entrance. to the Strait of Magellan. 
January 20,1876. Lat. 52° 20’ 0” §., long. 67° 390” W. Depth 55 fathoms. Sand. 
Bottom temperature 47°-8 Fahr. ; surface temperature 48°°2 Fahr. 
Station 315. Port William, Falkland Islands. January 26,1876. Lat. 51° 40’ 0”S., 
long. 57° 50’ 0” W. Depth 12 fathoms. Sand, gravel. Surface temperature 50°0 Fahr. 
Remarks.—This species presents a close resemblance in its general habit to Asterias 
meridionalis, but is distinguished by having only five rays, by the tuft-like character of 
the abactinal spinelets with the vesiculated pedicellariee, and by the regular presence of an 
intermediate series of well-developed spines, with pedicellarize, between the infero-mar- 
ginal and adambulacral spines. 
6. Asterias rubens, Linné. 
Asterias rubens, Linné, 1766, Systema Nature, ed. xii. p. 1099. ] 
Asterias glacialis, Pennant, 1777, British Zoology, vol. iv. p. 60. . 
Asterias clathrata, Pennant, 1777, British Zoology, vol. iv. p. 61. 
Asterias holsatica, Retzius, 1805, Dissert. sist. spec. cog. Asteriarum, p. 22 
