REPORT ON THE ASTEROIDEA. 435 
Rays elongate, subcylindrical, broad at the base, and tapering gradually to a pointed 
extremity. Disk small and somewhat inflated, with deep channels in the median inter- 
radial lines, the rays appearing to be crushed together at the base. Interbrachial 
ares acute. 
The abactinal and lateral areas are covered with narrow plates transversely disposed, 
which are arranged in longitudinal rows along the rays. The median radial series, the 
supero-marginal, and the infero-marginal (or actinal) series, form regular series. Between 
the supero-marginal and the median radial series are two series of smaller plates which 
are not so regular. ach of the plates of the median series bears a single lineal series of 
five to seven low, truncate, granule-like spinelets, which follows the line of the plate, and 
is consequently transverse in position in relation to the ray. The spinelets are all uniform, 
equidistantly spaced, and the median one is slightly removed adcentrally from the line 
which the others form. The plates of the two series of small intermediate plates may each 
bear two or three similar granules or spinelets, which are also disposed in transverse lines. 
These two series are not very distinctly divided from each other, but are clearly separated 
from the broad median radial series on the one side, and the equally broad supero-marginal 
series on the other by narrow well-defined bands. The plates, which I consider to be the 
representatives of supero-marginals, are entirely situated in the lateral wall of the ray ; 
they are equal in height to the breadth of the median radial series, and each plate bears a 
single line of five or six uniform, equally spaced, granule-like spinelets, the two lowest 
sometimes standing slightly oblique, and giving the appearance of a faint angle in the 
line. All the spinelets on the seven series of plates above described are uniform and 
equally spaced ; and their regular transversely lineal disposition on the rays gives a 
remarkable and characteristic appearance to the species. The interspaces between the 
plates are occupied by small and remarkably uniform papule. A few widely spaced, 
isolated, forcipiform pedicellariz are present among the papul and on the plates. 
The armature of the actinal series of plates adjacent to the adambulacral plates, which 
I consider to be the representatives of infero-marginal plates, consists of four or occasion- 
ally five short, robust, slightly compressed, truncate or obtusely tipped spinelets. The 
uppermost spinelet is rather smaller than, and somewhat isolated from, the others, which 
are arranged in a slightly oblique transverse series; when four are present between the 
uppermost spinelet and the adambulacral plates, they may be arranged in two slightly 
oblique pairs. Near the small upper spinelet are two or three forcipiform pedicellaric 
similar to those on the abactinal and lateral areas ; and between the transverse series of 
larger spinelets, near the adambulacral plates, may be occasionally a large isolated forfici- 
form pedicellaria, with broad, expanded, denticulate, interlocking jaws, fancifully resem- 
bling a cat’s paw, and recalling by their shape the forficiform pedicellarie in Stcchaster 
Selipes. 
The adambulacral plates abut on the infero-marginal plates, and their armature consists 
