records' of w.a. museum. 
[ T 45 
CULCITASTER ANAMESUS, 1 sp. nov. 
Plate XIX. 
Rays 5. R.= 185 mm. r = no mm. Br. at base=70 mm. Br. at 
20mm. from tip of ray, 28 mm. Disk circular somewhat swollen, 
at least 200 mm. in diameter, and projecting beyond superomar- 
ginals in all interradial areas. Entire animal covered with a closely 
though rather coarsely granulated skin, which conceals many ol the 
marginal plates but through which most of the abactinal plates are 
discernible. These plates seem to be rounded or stellate and are 
united with each other by narrow radiating plates, six or seven to 
each central plate. All the space between these radiating plates is 
occupied by papulae, so that the papular areas, each with dozens 
of papulae, are more or less triangular in shape and are arranged in 
groups of six or seven around each primary abactinal plate. On 
the rays, distal to the disk, one can distinguish at least three longi- 
tudinal series of plates and hence the papular areas have a linear 
arrangement. Six or eight superomarginal plates on each side of 
the tip of the ray are easily recognisable; the last four or five are 
high and narrow and at least on two arms, the two distalmost pairs 
meet abactinally in the median line. Terminal plates relatively 
very small. Tip of ray turned up so far that as in Culcita, the 
ambulacral grooves extend on to the abactinal surface. 
Actinal surface flat, tessellated, covering-membrane not con- 
cealing the outlines of the plates. Distal to each mouth angle is a 
large rhomboidal plate about 18 mm. across ; from its two distal 
sides extend the series of conspicuous actinolateral plates, at first 
nearly square but soon becoming evidently wider than long. Distal 
to the large rhomboidal plate is a similar but smaller plate, its two 
proximal sides in contact with the first actinolateral plates ; from its 
two distal sides extend series of plates adjoining and parallel to the 
actinolaterals. Distal to the second rhomboidal plate is a similar 
but smaller plate from whose distal sides, series parallel to the 
actinolaterals again arise. Distal to the third rhomboidal plate is a 
pair of narrow plates lying side by side, from the distal ends of each 
of which a series of four or five similar plates extends to the margin 
of the area. Adjoining each of these series are parallel rows which 
1 Gr. anamesos — in the middle ; in reference to its intermediate position. 
