270 
Arms long and siender, regularly tapering to a point; paxillar 
area rather narrow. The paxillæ (Fig. l.d) with ca. 10 —12 peri- 
pheral and 3 — 5 central spinelets, all alike, siender and thorny. 
No enlarged central spinelet. The paxillæ of the disk are slightly 
larger than-those of the arms, diminishing in size only very close 
to the small central cone. They 
do not form regular transverse 
series on the arms. The num- 
ber of spinelets in the paxillæ 
gradually diminishes a little 
on the arms. No pedicellariæ. 
Superomarginals covered 
with a close coat of very fine, 
short spinelets; the proximal 
3—4 ones with an erect, not 
very prominent orstrongspine. 
In places there is an indica- 
tion of a spine on a few of 
the following plates, unto the 
eighth, from which faet it 
may be concluded that in 
adult specimens the supero- 
marginal spine will be devel- 
oped at least to about the 
middle of the arms. In the 
smaller specimen these spines 
are still very small, even on the innermost plates. The inferomar- 
ginals (Fig. l.a), which project only very little beyond the supero¬ 
marginals, carry an oblique series of 3—4 pointed, not flattened 
spines; on the proximal 2—3 plates the uppermost spine is the 
longest, from about the fourth generally a smaller spine appears 
above the larger upper one. The lower part of the plate is covered 
with small spines, somewhat coarser in the middle of the plate. 
Terminal plate very finely granular, nearly smooth. In the larger 
specimen there are no spines on the terminal plate, but in the 
smaller specimen one of the plates has traces of two fairly robust 
spines below the point. Probably these spines have then been 
Fig. 1. Astropecten dubiosus. a. inferomarginal; 
b. mouthplates; c. adambulacral plate; 
d. paxillæ. a—c. ^^/i; d. ^Vi. 
