RECORDS OF W.A. MUSEUM. 
i6oJ 
Ion", but the stalk is little more than half that ; it has no “ limb.” 
The valves are shaped very much like those of the small ^lobiferous 
pedicellariae, but the terminal opening is surrounded by coarse, 
curved teeth. This opening is very variable in size and form ; it 
may be less than one-fourth the length of the valve or it may be 
nearly two-fifths ; it is often of some peculiar shape and not rarely 
is divided vertically into two openings ; even when the opening is 
short there is little tendency towards a “snout-like” blade. The 
large globiferous pedicellariae vary very little in size and do not 
seem to intergrade at all with the small ones. 
Primary spines very stout, rough with small rounded granules, 
which soon become more or less completely concealed by a spongy 
alteration in the outer layer of the spine and the profuse growth of 
bryozoa, sponges and other organisms which cover the old spines. 
At the tip, the series of rounded granules are arranged longitudi- 
nally and pass into ridges which surround the blunt end of the spine. 
Young spines are bluntly pointed but become more and more flaring 
with age and the actinal primaries are particularly notable for their 
stoutness and flaring tips. The thickness of some of these at tip 
may be equal to one fourth or even almost one-third the total length 
of the spine. There are 24-36 longitudinal ridges around the tips 
of the larger primaries. The collar is low, seldom over 3 mm. in 
height. 
Colour, deep red-brown, so far as secondaries, miliaries and 
pedicellariae ar-e concerned ; young primary spines yellow-brown, 
but rapidly darkening with age ; the collar remains yellow-brown 
throughout life, but the rest of the spine, where not covered by 
foreign growths, has a marked purplish-red shade. 
Between Fremantle and Geraldton, W.A. Two specimens, 
No. 4935- The larger is the Type. 
The type specimen of this fine new species is one of the largest 
and most perfectly preserved cidarids I have ever seen. The other 
specimen is 75 mm. h.d. and 51 v.d., so that v.d. is little more than 
.66 h.d. There are 8 or g interambulacral plates in each column. 
In other particulars the specimens differ little from each other 
While the relationship to imperialis is obvious, this species is easily 
distinguished by the remarkable actinal primaries and the large 
number of coronal plates. To no other of the Recent species of the 
genus does it show any close relationship. 
