REPORT ON THE ASTEROIDEA. 317 
of paxillz are bounded at the one extremity by the marginal plates of the disk and at the 
other by the median interradial line, and the paxillz in each series diminish slightly in 
size as they approach the margin. In addition to their longitudinal arrangement the 
paxillze appear to fall into regular obliquely transverse lines proceeding from the median 
interradial line to the margin of the disk. From this circumstance, together with the fact 
that the larger paxille are in the neighbourhood of the primary radial plate, and that the 
rest diminish as they recede therefrom, the ornamentation of the disk has a very charac- 
teristic appearance. The larger paxillee are regularly hexagonal, with their margin beset 
with fifteen to eighteen very short, robust, subprismatic, truncate, papilliform granules, and 
with four to nine slightly larger but irregular-sized ones on the tabulum, usually definitely 
spaced but also more or less polygonal. On the smaller plates the number of granules 
is less, but they appear quite as large and robust as those on the larger paxille. The 
single series of small square plates which occupies the median abactinal line of the ray are 
covered with small semiglobular granules similar to those on the supero-marginal plates. 
The dorso-central plate is small and scarcely distinguishable from the numerous rather 
small plates which occupy the central area of the disk. In like manner it is not practi- 
cable to indicate definitely the representatives of the basals and under-basals. The madre- 
poriform body is small and almost hidden by the surrounding paxille; it lies external to 
its adjacent (basal?) plate, and its position is about midway between the centre of the 
disk and the margin. 
No pedicellariz of any kind are present. 
Colour in alcohol, a slightly Heeata ashy grey, with a darker dirty bluish grey shade 
over the paxillar area. 
Young Phase.—In a small specimen measuring R= 30 mm., 7=8°5 mm., the basal 
plates are clearly distinguishable and are the largest paxillee on the disk. Internal to the 
primary radial plate are a pair of plates,—a character which may also be noted, but less 
easily, in the larger example. 
Locality.—Station 106. Near the Equator, due south of the Cape Verde Islands. 
August 25, 1873. Lat. 1° 47’ 0” N., long. 24° 26’ 0” W. Depth 1850 fathoms. Globi- 
gerina ooze. Bottom temperature 36°°6 Fahr. ; surface temperature 78°:0 Fahr. 
Remarks.—The specimen which forms the subject of the above description is un- 
fortunately without any indication whatever of its locality. It was found in Sir Wyville 
Thomson's study after his death. The smaller specimen, which is precisely correspondent 
in every respect and unquestionably belongs to the same species, was dredged at Station 
106. 
In many respects this species differs so considerably from Paragonaster ctenipes that 
at first sight it would scarcely be thought to belong to the same genus. The character 
of the abactinal ornamentation has quite a different appearance; and the broad adam- 
bulacral plates of Paragonaster ctenipes present a feature special to that species. Care- 
