SEA LILIES, STARFISHES, ETC.—cLARK. 113 
Family TEMNOPLEURID. 
Genus Satmacis, L. Agassiz. 
SALMACIS OLIGOPORA,! sp. nov. 
(Plate xlii., fig. 1-2; Plate xliii., fig. 2.) 
Test 60-81 mm. h.d.; 29-39mm.v.d.; height therefore 
just less than half the horizontal diameter. Very similar to 
S. dussumiert and S. erythracis, but differing in at least three 
particulars ; relative number of ambulacral and interambu- 
lacral plates in each column, form of base of valves of globi- 
ferous pedicellariz, and colouration. The number of coronal 
plates in the specimens at hand runs from 28 to 34, while the 
number of ambulacral plates in a column is from 48 to 55 ; 
thus the number of ambulacral plates is only .52-.62 more 
than the number of coronal plates; in S. dusswmiert and S. 
erythracis it is .70-.87 more. The base of the valves of the 
globiferous pedicellariz is rather higher than wide and the 
upper lateral corners are elongated to a much greater degree 
than in any other species of Salmacis, and flare outwards 
slightly. Finally the colouration is utterly unlike that of 
S. dussumierit and quite different from that of S. erythracis. 
The test is pale brownish ; the miliary spines and pedicellarize 
are white, the secondary spines are white or pale greenish 
or tipped with greenish, and the primaries are greenish-white 
with 1-3 broad, indefinite bands of olive-green ; the actinal 
primaries may be white without any green or they may be 
broadly tipped with olive-green ; sometimes there is also a 
band of olive green near middle of spine. There is no hint 
of red or violet anywhere. 
There are too few specimens of S. dusswmiers and S. 
erythracis at hand to enable me to determine satisfactorily 
the relationship of the three species to each other. They 
agree in the peculiar characters of the ambulacra and abactinal 
system and so form a well marked section of the genus, but 
it is possible that the characters by which I have separated 
the three forms from each other are of less significance than 
I suppose. 
One of the specimens of S. oligopora from off Sandon 
Bluffs, New South Wales, has a remarkably deformed abac- 
tinal area ; the anal and genital plates are sunk much below 
the abactinal part of the ambulacra, and the latter are bent 
abruptly downwards and inwards to them ; thus the vertical 
diameter of the test at the distal portion of genital Tis 39 mm., 
ie odiyos=few+ zopos=a way through, a pore; in reference to the 
relatively small number of ambulacral pores. 
