434 THE VOYAGE OF H.M.S. CHALLENGER. 
tudinal rows, one directed over the furrow and the other outward. Occasionally one of 
these spinelets may be replaced or accompanied by one of the large cat’s-paw-like forfici- 
form pedicellariz. 
The plates of the inner row of actinal intermediate plates, adjacent to the adambu- 
lacral plates, bear one short, robust, obtuse spinelet, rather larger than the spinelets on 
the abactinal plates; and the plates of the outer row (at least on more than the inner 
half of the ray) bear two similar spinelets, placed side by side and rather oblique. On 
the intermediate row, when this is present, there may be one spinelet like those on the 
inner row, or occasionally near the base of the ray two spinelets like those on the outer 
row of plates. On the membrane which covers these plates are numerous, but distinctly 
spaced, sessile, forcipiform pedicellariz and occasionally one of the large cat’s-paw-shaped 
forficiform pedicellariz. 
In the armature of the mouth-plates there are several of these large pedicellariz, and 
in the median actinal interradial area reaching from the mouth-plates to the margin are 
several large pedicellaria of the same pattern, wide apart ; and no other appendages of 
any kind are present on the membrane in this region. 
The madreporiform body, which is small, occupies the central half of one of the basal 
plates, and its circumference is surrounded by irregularly placed spinelets. It is situated 
nearer the centre than midway between that point and the margin. 
The anal aperture is distinct. 
The ambulacral tube-feet are crowded, and form four rows. 
Colour in alcohol, a brownish ashy grey, or a slightly orange yellow. 
Localities.—Station 142. South of the Cape of Good Hope. December 18, 1873. 
Lat. 35° 4’ 0” S, long. 18° 370” E. Depth 150 fathoms. Green sand. Bottom tem- 
perature 47°°0 Fahr.; surface temperature 65°°5 Fahr. 
Simon’s Bay, Cape of Good Hope. Depth and conditions not recorded. 
Remarks.—This species presents some superficial resemblance to Stechaster awran- 
tiacus, but is readily distinguished from that form and all the other members of the genus 
by the character of the spinulation of the plates and by the presence of the remarkably 
large and strangely shaped forficiform pedicellariz. 
A slight difference may be noticed in the spinulation of the marginal plates in the 
examples from Simon’s Bay as compared with one from Station 142, the spinelets being 
more numerous and more grouped in the former. The difference is so slight that I do 
not consider further remark necessary. The example from Station 142 has also rather 
more robust rays. 
6. Stichaster polygrammus, n. sp. (PI. C. figs. 1-3; Pl. CIII. figs. 5 and 6). 
Raysfive. R=79mm.;7=10mm. R<8,r. Breadth of a ray at the base, 12°5 mm. ; 
breadth about midway between the base and the extremity, 10 mm. 
