SEA LILIES, STARFISHES, ETC.—CLARK. 53 
will be necessary before we can be sure that we are dealing 
with only a single species. 
Locs.—East of Maria Island, Tasmania, 78 fathoms. 
Between Geraldton and Cape Naturaliste, Western Aus- 
tralia. 
Genus OpnHtpIAsTER, L. Agassiz. 
OPHIDIASTER CONFERTUS,! sp. nov. 
(Plate xv., fig. 1-2.) 
R=81 mm.; r=9mm.; R=9r. Br=10 mm.; R=8 br. 
Br at middle of ray=10 mm. ; at tip=6 mm. Disk small ; 
rays 5, long and cylindrical. Abactinal plates in 3 regular 
series, about equal in size to marginals. Papular areas in 8 
regular series, one on each side of ray, on actinal surface ; 
each area contains 15-20 papule. All abactinal and mar- 
ginal plates more or less conspicuously tumid. Entire 
animal clothed in a densely granular skin ; on papular areas, 
there are 30-40 granules, or even more, to each square milli- 
meter, but on convexities of abactinal plates, there may be 
only 10-15, though there are often more. Madreporite single, 
2-3 mm. in diameter. Terminal plate scarcely more than a 
millimeter in diameter, bare. Adambulacral plates short and 
numerous ; on the furrow-margin are 2 blunt, rounded, but 
flattened spines, about 1 mm. long ; the aboral is a trifle the 
smaller as a rule ; the tips of these adambulacral spines are 
separated from each other by granules such as cover the 
surface of plates ; near the mouth each plate carries an oval, 
blunt, flattened spine about a millimeter long and rather more 
than its own length from the furrow-series ; distally, these 
‘subambulacral spines often occur only on every other plate 
and the transition from being on every plate to being on every 
other plate may be abrupt ; in such cases the spines near the 
mouth seem crowded. Oral plates not peculiar, small and 
completely buried in granules. Pedicellarize more or less 
abundant everywhere, but particularly near the mouth and 
on the papular areas; they are of the well-known type 
occurring in O. germani, O. lorioli, etc. ; the whole organ is 
about .75 mm. long by .25 mm. wide and each jaw has 3-5 
teeth. Colour (dry), yellow-brown. 
1. Confertus=crowded ; in reference to the tendency of the subambu- 
-acral spines to be very near together proximally. 
