REPORT ON THE ASTEROIDEA. 587 
with numerous very fine striations, which radiate centrifugally, with considerable regu- 
larity. 
Colour in alcohol, a bleached yellowish white ; the spinelets white. 
Locality.—Station 232. South of Yeddo, Japan. May 12,1875. Lat. 35° 11/0" N., 
long. 139° 28’0” E. Depth 345 fathoms. Greenmud. Bottom temperature 41°°1 Fahr. ; 
surface temperature 64°:2 Fahr. 
Remarks.—Asterias (Stolasterias) stichantha is a large and striking form, altogether 
unlike any other species in the genus. It may be at once distinguished by the isolated, 
equally spaced, basally-wreathed spinelets, arranged in numerous longitudinal series. 
22. Asterias (Stolasterias) eustyla, n. sp. (P]. CVI. figs. 5-8). 
Rays five. R=60mm.;7=7mm. R>8 r. Breadth ofa ray near the base, 8 to9 mm. 
Rays elongate, comparatively robust, tapering slightly towards the extremity ; about 
as high as broad, and subangular in section in consequence of the prominence of the 
supero-marginal and median radial series. Disk very small and indistinctly defined, not 
higher than the rays. Interbrachial ares acute. 
The abactinal surface of the rays is bounded by a supero-marginal series of plates on 
each side, each of which bears a single erect, rather robust, conical, pointed spinelet about 
3 mm. in length, encircled at the base by a large, thick, semiglobular wreath of pedicel- 
lariz, rendered more massive by the presence of membrane. The median abactinal line 
of the ray is occupied by a precisely similar longitudinal series of equal-sized spinelets 
with basal wreaths of pedicellariz, and in the interspace between the median and supero- 
marginal series is a serles—more or less interrupted—of exactly similar but rather smaller 
spinelets, with basal wreaths. Papule, which are large, delicate, and bag-like when 
extended, occur in the narrow space between the wreaths of pedicellariz, and occupy also 
the spaces where the intermediate series is interrupted. The lateral wall or space between 
the supero-marginal series and the infero-marginal series is occupied only by large papule, 
and these are either isolated or in indistinct groups of two or three. The infero-marginal 
plates form a conspicuous and regular longitudinal series, and each bears three spines 
arranged in an oblique series, which stands at an angle of about 45 degrees to the direction 
of the ray. These spines are robust at the base, flattened at the tip, and either truncate or 
obtusely rounded. The outermost spine is larger and longer than any of the spines above 
noticed on the abactinal surface, the median spine is rather smaller, and the innermost 
spine, which is very near the adambulacral plates, is not more than half the size of the 
outermost spine. On the outer side of the outermost spine is a large semiglobular tuft of 
pedicellariz, similar to those above described, but it does not encircle the spine as a 
wreath. Near the base of the innermost spine is a single large papula, and the series of 
these separates the infero-marginal spines from the adambulacral plates. 
